fix: findFilesByfilename respects path option

[rollyjoel]

scope code search to path and return paths relative to path.
update python releaser to call findFilesByfilename appropriately.

Fixes #664

[codecov]

Codecov Report

Merging #665 (530265b) into master (5735410) will decrease coverage by 0.00%.
The diff coverage is 80.95%.

@@            Coverage Diff             @@
##           master     #665      +/-   ##
==========================================
- Coverage   85.05%   85.04%   -0.01%     
==========================================
  Files          48       48              
  Lines        5821     5838      +17     
  Branches      539      542       +3     
==========================================
+ Hits         4951     4965      +14     
- Misses        869      872       +3     
  Partials        1        1              

Impacted Files	Coverage Δ
src/releasers/python.ts	34.96% <0.00%> (-0.75%)	⬇️
src/github.ts	83.23% <100.00%> (+0.22%)	⬆️

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[rollyjoel]

I wasn't quite up to adding a test/releasers/python.ts so codecov nailed me :-( I'd be happy to augment a test file if someone else starts it. I looked briefly at test/releasers/node.ts and decided I didn't have the time to invest in figuring it out/porting it for the python releaser, at least not before getting buy-in on this solution.

[bcoe]

@joeldodge79 I'm on a vacation for the next few days, very much appreciate the patch, will look soon.

[bcoe]

@joeldodge79 this looks like a good fix to me 👍

[rollyjoel]

@bcoe sorry for the lag, I was completely unplugged for the past two weeks. I just rebased the branch. There's still the codecov issue for test/releasers/python.ts ... ok to let slide for now?