refactor: better typescript support and linting

[exreplay]

No description provided.

[codecov]

Codecov Report

Merging #291 (2654c6c) into development (3eacddc) will decrease coverage by 0.30%.
The diff coverage is 96.72%.

@@               Coverage Diff               @@
##           development     #291      +/-   ##
===============================================
- Coverage        98.51%   98.20%   -0.31%     
===============================================
  Files               19       19              
  Lines              269      279      +10     
  Branches            40       41       +1     
===============================================
+ Hits               265      274       +9     
- Misses               2        3       +1     
  Partials             2        2              

Impacted Files	Coverage Δ
packages/@averjs/config/lib/configs/app.ts	100.00% <ø> (ø)
packages/@averjs/config/lib/configs/core.ts	100.00% <ø> (ø)
packages/@averjs/config/lib/configs/index.ts	100.00% <ø> (ø)
packages/@averjs/config/lib/configs/renderer.ts	100.00% <ø> (ø)
packages/@averjs/cli/lib/commands/help.ts	96.66% <75.00%> (ø)
packages/@averjs/config/lib/index.ts	92.30% <92.30%> (-3.35%)	⬇️
...kages/@averjs/babel-preset-app/lib/getPolyfills.js	100.00% <100.00%> (ø)
packages/@averjs/babel-preset-app/lib/index.js	100.00% <100.00%> (ø)
...es/@averjs/babel-preset-app/lib/polyfillsPlugin.js	80.00% <100.00%> (ø)
packages/@averjs/cli/lib/commands/build.ts	100.00% <100.00%> (ø)
... and 7 more

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