chore(package): update spike-core to version 2.0.0 (#39)

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
     "coveralls": "^2.13.1",
     "nyc": "^10.3.0",
     "source-loader": "^0.2.0",
-    "spike-core": "^1.2.0",
+    "spike-core": "^2.0.0",
     "standard": "^10.0.2"
   },
   "engines": {