feat: do not remove style tag

Removing style tag is an optimization, SVGO can do it better than us.

BREAKING CHANGE:

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.

Closes #191

Author: gregberge

packages/core/src/__snapshots__/convert.test.js.snap

@@ -428,6 +428,7 @@ const SvgComponent = props => (
         <path d=\\"M51 37L37 51\\" id=\\"Shape\\" />
         <path d=\\"M51 51L37 37\\" />
       </g>
+      <style />
     </g>
   </svg>
 )

packages/core/src/h2x/__snapshots__/removeStyle.test.js.snap

@@ -8,7 +8,6 @@ export { default as emSize } from './h2x/emSize'
 export { default as expandProps } from './h2x/expandProps'
 export { default as removeComments } from './h2x/removeComments'
 export { default as removeDimensions } from './h2x/removeDimensions'
-export { default as removeStyle } from './h2x/removeStyle'
 export { default as replaceAttrValues } from './h2x/replaceAttrValues'
 export { default as stripAttribute } from './h2x/stripAttribute'
 export { default as svgAttributes } from './h2x/svgAttributes'

packages/core/src/h2x/removeStyle.js

@@ -5,7 +5,6 @@ import {
   expandProps,
   removeComments,
   removeDimensions,
-  removeStyle,
   replaceAttrValues,
   stripAttribute,
   svgAttributes,
@@ -16,12 +15,7 @@ import {
 } from '..'
 
 function configToPlugins(config) {
-  const plugins = [
-    jsx,
-    stripAttribute('xmlns'),
-    removeComments(),
-    removeStyle(),
-  ]
+  const plugins = [jsx, stripAttribute('xmlns'), removeComments()]
   if (config.replaceAttrValues)
     plugins.push(replaceAttrValues(config.replaceAttrValues))
   if (!config.dimensions) plugins.push(removeDimensions())