Update dependency semver to v7

Author: renovate-bot

package.json

@@ -81,7 +81,7 @@
     "rollup-plugin-babel": "4.3.3",
     "rollup-plugin-babel-minify": "9.1.1",
     "rollup-plugin-node-resolve": "5.2.0",
-    "semver": "6.3.0",
+    "semver": "7.0.0",
     "react-dom": "16.12.0",
     "serve-static": "1.14.1",
     "uglifyjs-webpack-plugin": "2.2.0",