remove npm-merge-driver dep

Author: JoviDeCroock

package.json

@@ -77,7 +77,6 @@
     "eslint-config-developit": "^1.1.1",
     "microbundle": "^0.6.0",
     "mocha": "^5.2.0",
-    "npm-merge-driver": "2.3.5",
     "npm-merge-driver-install": "^1.1.1",
     "preact": "^10.0.4",
     "sinon": "^1.17.5",