v0.4.0

Quiqbox v0.4.0

Diff since v0.3.2

Merged pull requests:

• 0.4.0 Updates (#60) (@frankwswang)
• Added test functions compr2Arrays3. (#61) (@frankwswang)
• Added compatibility constraint for Tullio.jl. (#63) (@frankwswang)
• Updated the documentation. (#64) (@frankwswang)
• Updated the documentation. (#65) (@frankwswang)
• Updated doctests to improve Julia cross-vers comp. (#66) (@frankwswang)