pest-test v0.1.6

• Test case whitespace trimming behavior now matches tree-sitter test: the first and last newline is trimmed from the code block, while any other leading/trailing whitespace is left in place (#3, #6).
• String values in S-expression terminals are now escaped (#7).
• Minor fixes to documentation (#8) and error messages (#5)
• Added CI workflow.

Thanks to @bjmc and @rKvasno!