fix(parcel-plugin): support "parcel" and "parcel-bundler"

Closes #410

Author: gregberge

packages/parcel-plugin-svgr/package.json

@@ -29,9 +29,6 @@
     "build": "babel --config-file ../../babel.config.js -d lib --ignore \"**/*.test.js\" src",
     "prepublishOnly": "yarn run build"
   },
-  "peerDependencies": {
-    "parcel": "^1.10.0"
-  },
   "dependencies": {
     "@babel/core": "^7.7.5",
     "@babel/plugin-transform-react-constant-elements": "^7.7.4",

packages/parcel-plugin-svgr/src/asset.js

@@ -1,4 +1,3 @@
-import { Asset } from 'parcel'
 import { transformAsync, createConfigItem } from '@babel/core'
 import svgo from '@svgr/plugin-svgo'
 import jsx from '@svgr/plugin-jsx'
@@ -7,6 +6,18 @@ import presetReact from '@babel/preset-react'
 import presetEnv from '@babel/preset-env'
 import pluginTransformReactConstantElements from '@babel/plugin-transform-react-constant-elements'
 
+/* eslint-disable global-require, import/no-unresolved */
+function requireParcel() {
+  try {
+    return require('parcel')
+  } catch (error) {
+    return require('parcel-bundler')
+  }
+}
+/* eslint-enable global-require, import/no-unresolved */
+
+const { Asset } = requireParcel()
+
 const babelOptions = {
   babelrc: false,
   configFile: false,