feat: support fetch remote rc file

[lianghx-319]

Closes#217

[codecov-io]

Codecov Report

Merging #230 into master will decrease coverage by 43.11%.
The diff coverage is 84%.

@@ Coverage Diff @@## master #230 +/- ##
===========================================
- Coverage 84.24% 41.12% -43.12% 
===========================================
Files 8 8 Lines 349 372 +23 ===========================================
- Hits 294 153 -141 - Misses 55 219 +164

Impacted Files	Coverage Δ
lib/src/Program.js	82.14% <100%> (ø)	⬆️
lib/src/_utils.js	94.28% <83.33%> (-5.72%)	⬇️
lib/src/Gren.js	5.26% <0%> (-76.08%)	⬇️
lib/src/GitHubInfo.js	80.95% <0%> (-4.77%)	⬇️

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[alexcanessa]

@all-contributors please add @lianghx-319 for code

[allcontributors]

@alexcanessa

I've put up a pull request to add @lianghx-319! 🎉