ain 1.6.0

[BrewTestBot]

Created by brew bump

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Created with brew bump-formula-pr.

release notes

# Features
`--vars` flag added for setting environment variables via ain (suggested in #29)
Add usable real world examples as a folder on the project home page 
Bugfixes
$(printf ${VAR}) stopped working in 1.5 and would output ${VAR}

Remove the exclamation mark (filename.ain!) in fatals

Consumed sections (such as [Config] will not be processed when substituting executables)
Dev features
e2e tests added with code coverage

Added a taskfile for less typing and frail memory

[github-actions]

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