build(deps-dev): update svgo requirement from 1.2.0 to 1.2.2

Updates the requirements on [svgo](https://github.com/svg/svgo) to permit the latest version.
- [Release notes](https://github.com/svg/svgo/releases)
- [Changelog](https://github.com/svg/svgo/blob/master/CHANGELOG.md)
- [Commits](https://github.com/svg/svgo/compare/1.2.0...v1.2.2)

package.json

@@ -98,7 +98,7 @@
     "script-loader": "0.7.2",
     "serve-static": "^1.13.2",
     "svg-sprite-loader": "4.1.3",
-    "svgo": "1.2.0",
+    "svgo": "1.2.2",
     "vue-template-compiler": "2.6.10"
   },
   "engines": {