percy visual tests

.gitignore

@@ -20,3 +20,4 @@ node_modules/
 /resources/
 /svg-tmp/
 /components/
+/percy.sh

package.json

@@ -90,6 +90,7 @@
     "node-sass-package-importer": "5.3.2",
     "nodemon": "2.0.2",
     "npm-run-all": "4.1.5",
+    "percy": "^0.21.0",
     "postcss-cli": "7.1.0",
     "rollup": "1.31.0",
     "rollup-plugin-babel": "4.3.3",