diff --git a/package-lock.json b/package-lock.json
index 167d859..a9a2269 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,10 +32,28 @@
         "regenerator-runtime": "^0.12.0"
       }
     },
+    "@sindresorhus/is": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
+      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ=="
+    },
+    "@szmarczak/http-timer": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
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+      "requires": {
+        "defer-to-connect": "^1.0.1"
+      }
+    },
+    "@truffle/error": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/@truffle/error/-/error-0.0.6.tgz",
+      "integrity": "sha512-QUM9ZWiwlXGixFGpV18g5I6vua6/r+ZV9W/5DQA5go9A3eZUNPHPaTKMIQPJLYn6+ZV5jg5H28zCHq56LHF3yA=="
+    },
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-      "version": "10.12.18",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.12.18.tgz",
-      "integrity": "sha512-fh+pAqt4xRzPfqA6eh3Z2y6fyZavRIumvjhaCL753+TVkGKGhpPeyrJG2JftD0T9q4GF00KjefsQ+PQNDdWQaQ=="
+      "version": "10.17.60",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.17.60.tgz",
+      "integrity": "sha512-F0KIgDJfy2nA3zMLmWGKxcH2ZVEtCZXHHdOQs2gSaQ27+lNeEfGxzkIw90aXswATX7AZ33tahPbzy6KAfUreVw=="
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@@ -61,7 +79,7 @@
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-      "integrity": "sha1-4h3xCtbCBTKVvLuNq0Cwnb6ofk0="
+      "integrity": "sha512-H7wUZRn8WpTq9jocdxQ2c8x2sKo9ZVmzfRE13GiNJXfp7NcKYEdvl3vspKjXox6RIG2VtaRe4JFvxG4rqp2Zuw=="
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@@ -96,7 +114,7 @@
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-      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
+      "integrity": "sha512-7UvmKalWRt1wgjL1RrGxoSJW/0QZFIegpeGvZG9kjp8vrRu55XTHbwnqq2GpXm9uLbcuhxm3IqX9OB4MZR1b2A=="
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@@ -121,13 +139,14 @@
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-      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
-      "integrity": "sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==",
+      "version": "5.4.1",
+      "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-5.4.1.tgz",
+      "integrity": "sha512-+I//4cYPccV8LdmBLiX8CYvf9Sp3vQsrqu2QNXRcrbiWvcx/UdlFiqUJJzxRQxgsZmvhXhn4cSKeSmoFjVdupA==",
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         "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0"
+        "minimalistic-assert": "^1.0.0",
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@@ -175,9 +194,9 @@
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-      "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
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@@ -188,9 +207,9 @@
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+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.3.tgz",
+      "integrity": "sha512-pvcNpa0UU69UT341rO6AYy4FVAIkUHuZXRIWbq+zHnsVcRzDDjIAhGuuYoi0d//cwIwtt4pkpKycWEfjdV+vww==",
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@@ -199,15 +218,15 @@
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-      "integrity": "sha1-E+v+d4oDIFz+A3UUgeu0szAMEmo=",
+      "integrity": "sha512-OorbnJVPII4DuUKbjARAe8u8EfqOmkEEaSFIyoQ7OjTHn6kafxWl0wLgoZ2rXaYd7MyLcDaU4TmhfxtwgcccMQ==",
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-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.3.tgz",
-      "integrity": "sha512-/qKPUQlaW1OyR51WeCPBvRnAlnZFUJkCSG5HzGnuIqhgyJtF+T94lFnn33eiazjRm2LAHVy2guNnaq48X9SJuw=="
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
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@@ -301,12 +320,19 @@
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-      "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
-      "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.1.0.tgz",
+      "integrity": "sha512-AdEER0Hkspgno2aR97SAf6vi0y0k8NuOpGnVH3O99rcA5Q6sh8QxcngtHuJ6uXwnfAXNM4Gn1Gb7/MV1+Ymbog==",
       "requires": {
-        "bn.js": "^4.1.0",
+        "bn.js": "^5.0.0",
         "randombytes": "^2.0.1"
+      },
+      "dependencies": {
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+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
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+        }
       }
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     "browserify-sha3": {
@@ -319,26 +345,76 @@
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-        "elliptic": "^6.0.0",
-        "inherits": "^2.0.1",
-        "parse-asn1": "^5.0.0"
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/browserify-sign/-/browserify-sign-4.2.1.tgz",
+      "integrity": "sha512-/vrA5fguVAKKAVTNJjgSm1tRQDHUU6DbwO9IROu/0WAzC8PKhucDSh18J0RMvVeHAn5puMd+QHC2erPRNf8lmg==",
+      "requires": {
+        "bn.js": "^5.1.1",
+        "browserify-rsa": "^4.0.1",
+        "create-hash": "^1.2.0",
+        "create-hmac": "^1.1.7",
+        "elliptic": "^6.5.3",
+        "inherits": "^2.0.4",
+        "parse-asn1": "^5.1.5",
+        "readable-stream": "^3.6.0",
+        "safe-buffer": "^5.2.0"
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
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+        },
+        "elliptic": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+          "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+          "requires": {
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+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
+            "minimalistic-crypto-utils": "^1.0.1"
+          },
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+              "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+              "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+            }
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+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
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+        },
+        "readable-stream": {
+          "version": "3.6.2",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+          "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
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+            "string_decoder": "^1.1.1",
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+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
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-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
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+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
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-        "ieee754": "^1.1.4"
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@@ -358,12 +434,12 @@
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-      "integrity": "sha1-DTM+PwDqxQqhRUq9MO+MKl2ackI="
+      "integrity": "sha512-VO9Ht/+p3SN7SKWqcrgEzjGbRSJYTx+Q1pTQC0wrWqHx0vpJraQ6GtHx8tvcg1rlK1byhU5gccxgOgj7B0TDkQ=="
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-      "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw="
+      "integrity": "sha512-T7zexNBwiiaCOGDg9xNX9PBmjrubblRkENuptryuI64URkXDFum9il/JGL8Lm8wYfAXpredVXXZz7eMHilimiQ=="
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@@ -373,7 +449,7 @@
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-      "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk="
+      "integrity": "sha512-571s0T7nZWK6vB67HI5dyUF7wXiNcfaPPPTl6zYCNApANjIvYJTg7hlud/+cJpdAhS7dVzqMLmfhfHR3rAcOjQ=="
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@@ -385,6 +461,35 @@
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       "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
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+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/cacheable-request/-/cacheable-request-6.1.0.tgz",
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+      "requires": {
+        "clone-response": "^1.0.2",
+        "get-stream": "^5.1.0",
+        "http-cache-semantics": "^4.0.0",
+        "keyv": "^3.0.0",
+        "lowercase-keys": "^2.0.0",
+        "normalize-url": "^4.1.0",
+        "responselike": "^1.0.2"
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+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-5.2.0.tgz",
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+          "requires": {
+            "pump": "^3.0.0"
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+        "lowercase-keys": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/lowercase-keys/-/lowercase-keys-2.0.0.tgz",
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@@ -462,6 +567,14 @@
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+      "resolved": "https://registry.npmjs.org/clone-response/-/clone-response-1.0.3.tgz",
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@@ -499,12 +612,9 @@
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-      "requires": {
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@@ -545,9 +655,9 @@
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+      "version": "2.1.4",
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@@ -564,12 +674,40 @@
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+      "resolved": "https://registry.npmjs.org/create-ecdh/-/create-ecdh-4.0.4.tgz",
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-        "elliptic": "^6.0.0"
+        "elliptic": "^6.5.3"
+      },
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+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
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+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
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