Fix #195: options --help and --version #197
Merged
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Fix #195: options --help and --version
Preparatory patch: Since we have GHC>=8 (base >=4.9), we can simplify package.yaml
yaml2json
Using optparse-applicative, let yaml2json understand options
in a robust way.
Otherwise, no change of cmdline syntax:
Tested build with GHC 8.0 - 9.0.
json2yaml
NYI, if everything is fine with the
yaml2json
half, I implement it forjson2yaml
likewise.