Update motoko and prettier-plugin-motoko npm dependencies (#320)

* Bump 'moc' to 0.14.0

* Update package-lock.json

* 0.16.21

* Update Node.js version matrix in CI

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x]
+        node-version: [20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:

package.json

@@ -2,7 +2,7 @@
     "name": "vscode-motoko",
     "displayName": "Motoko",
     "description": "Motoko language support",
-    "version": "0.16.20",
+    "version": "0.16.21",
     "publisher": "dfinity-foundation",
     "repository": "https://github.com/dfinity/vscode-motoko",
     "engines": {
@@ -173,9 +173,9 @@
         "ic-mops": "0.45.3",
         "ic0": "0.3.1",
         "mnemonist": "0.39.5",
-        "motoko": "3.9.7",
+        "motoko": "3.11.0",
         "prettier": "2.8.0",
-        "prettier-plugin-motoko": "0.10.4",
+        "prettier-plugin-motoko": "0.10.5",
         "semver": "7.6.3",
         "url-relative": "1.0.0",
         "vscode-languageclient": "8.0.2",