inlineStyles plugin doesn't remove all styles elements by default

[marcofugaro]

🐛 Bug Report

In the 3.0.0 changelog you wrote

Style tag will no longer be automatically removed. SVGO should handle it correctly using "inlineStyles" plugin. If you want to remove them, enable "removeStyleElement" plugin in your SVGO config.

This is wrong, inlineStyles sometimes doesn't remove the style tag, because of the option onlyMatchedOnce. See source codes for details

To solve this, I have set { inlineStyles: { onlyMatchedOnce: false } }, in the svgoConfig.plugins, but I think this needs to be set inside svgr.

To Reproduce

Use svgr on this svg

<svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 93 26.31">
  <defs>
    <style>
      .cls-1 {
        fill: #036;
      }
    </style>
  </defs>
  <path
    class="cls-1"
    d="M0,0V26.31H26.31V0ZM6.39,5.64h3.76l-3.76,5.8Zm0,15v-5.8l3.76,5.8Zm15.41-12H14.66v3h6.39v3H14.66v6L9.8,13.16l4.86-7.52H21.8Z"/>
  <path
    class="cls-1"
    data-name="path2 fill"
    d="M34.67,7.48,37,4.68h1.65L36.28,7.44l2.53,4H37.09L35.3,8.62l-.63.75v2H33.19V4.68h1.48Z"/>
</svg>

Expected behavior

Style tag would be removed

Run npx envinfo --system --binaries --npmPackages @svgr/core,@svgr/cli,@svgr/webpack,@svgr/rollup --markdown --clipboard

Paste the results here:

## System:
 - OS: macOS High Sierra 10.13.6
 - CPU: x64 Intel(R) Core(TM) i5-6267U CPU @ 2.90GHz
 - Memory: 153.36 MB / 16.00 GB
 - Shell: 3.2.57 - /bin/bash
## Binaries:
 - Node: 10.11.0 - /usr/local/bin/node
 - Yarn: 1.10.1 - /usr/local/bin/yarn
 - npm: 6.4.1 - /usr/local/bin/npm