Add sysinfo support

[CraZySacX]

• Add sysinfo feature to allow access to machine specific data that may be useful as build time data

[codecov]

Codecov Report

Merging #58 (082078b) into master (ba5162a) will decrease coverage by 0.79%.
The diff coverage is 94.77%.

@@            Coverage Diff             @@
##           master      #58      +/-   ##
==========================================
- Coverage   99.63%   98.84%   -0.80%     
==========================================
  Files          10       11       +1     
  Lines         552      694     +142     
==========================================
+ Hits          550      686     +136     
- Misses          2        8       +6     

Impacted Files	Coverage Δ
src/feature/mod.rs	100.00% <ø> (ø)
src/lib.rs	100.00% <ø> (ø)
src/feature/si.rs	92.30% <92.30%> (ø)
src/config.rs	100.00% <100.00%> (ø)
src/constants.rs	100.00% <100.00%> (ø)
src/error.rs	100.00% <100.00%> (ø)
src/gen.rs	100.00% <100.00%> (ø)
src/feature/git.rs	100.00% <0.00%> (+2.08%)	⬆️

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