Making hex, num and main crate no_std

[dr-orlovsky]

No description provided.

[codecov]

Codecov Report

Merging #100 (7c31213) into master (ef7102d) will decrease coverage by 0.1%.
The diff coverage is 20.0%.

❗ Current head 7c31213 differs from pull request most recent head 77728b9. Consider uploading reports for the commit 77728b9 to get more accurate results

@@           Coverage Diff            @@
##           master    #100     +/-   ##
========================================
- Coverage    66.9%   66.9%   -0.1%     
========================================
  Files          30      30             
  Lines        3519    3522      +3     
========================================
  Hits         2355    2355             
- Misses       1164    1167      +3     

Impacted Files	Coverage Δ
num/src/hex.rs	90.4% <ø> (ø)
num/src/lib.rs	100.0% <ø> (ø)
src/as_any.rs	100.0% <ø> (ø)
src/flags.rs	92.5% <0.0%> (-0.7%)	⬇️
src/lib.rs	34.1% <ø> (ø)
src/slice32.rs	71.6% <100.0%> (ø)

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