fix: prevent babel reading babel.config.js

[xwchris]

Summary

When use @svgr/webpack as loader in webpack and has a babel.config.js in project at the same time, svgr will read babel.config.js which will be merged to it's own config. This may causes some problems. For exmaple when I use react-hot-loader in babel.config.js, svgr throw an error

TypeError: Property value expected type of string but got null

Of course, if I change my own babel.config.js to .babelrc, then I can solve the problem because of babelrc: false

So, like babelrc: false, configFile: false prevent babel reading babel.config.js.

Test plan

This is my babel.config.js

when use @svgr/webpack to deal svg here is the output

but after add configFile: false the output is success

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[codecov]

Codecov Report

Merging #206 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #206   +/-   ##
=======================================
  Coverage   85.57%   85.57%           
=======================================
  Files          24       24           
  Lines         520      520           
  Branches      103      103           
=======================================
  Hits          445      445           
  Misses         67       67           
  Partials        8        8

Impacted Files	Coverage Δ
packages/webpack/src/index.js	95.45% <ø> (ø)	⬆️

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[gregberge]

Thanks for this fix!

[stevemao]

@neoziro could you make a new release, please?