Drop JSON direct use and just use distmeta.
v2.019000

 [00 Minor]
 - Test and dependency recommendation adjustments.
 - no code changes.

 [Dependencies::Noteworthy]
 - Cpanel::JSON::XS and JSON::MaybeXS now in runtime.recommends instead of JSON{,::XS}

 [Dependencies::Stats]
 - Dependencies changed since 2.018000, see misc/*.deps* for details
 - develop: ↑2
 - runtime: ↑2 (recommends: +2 -2)
 - test: -1

 [Tests]
 - Tests no longer require parsing JSON manually to validate themselves and instead just read distmeta.
post-release cleanup