Dependency updates and GitHub Actions

[tk3369]

Changes

• Added compat section in Project.toml
• Removed Manifest.toml
• Added github actions for CompatHelper and TagBot.

[codecov]

Codecov Report

Merging #3 into master will decrease coverage by 4.76%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##            master       #3      +/-   ##
===========================================
- Coverage   100.00%   95.23%   -4.77%     
===========================================
  Files            1        1              
  Lines           20       21       +1     
===========================================
  Hits            20       20              
- Misses           0        1       +1     

Impacted Files	Coverage Δ
src/BoxCoxTrans.jl	95.23% <0.00%> (-4.77%)	⬇️

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