chore(package): update semver to version 6.1.0

Closes #17

Author: greenkeeper[bot]

package.json

@@ -52,7 +52,7 @@
     "react": "^0.14 || ^15 || ^16",
     "rollup-plugin-babel": "^4.0.3",
     "rollup-plugin-commonjs": "^9.1.0",
-    "semver": "^5.5.1"
+    "semver": "^6.1.0"
   },
   "eslintConfig": {
     "extends": "./node_modules/kcd-scripts/eslint.js"