chore(package): update standard-version to version 3.0.0 (istanbuljs#415)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -114,7 +114,7 @@
     "source-map-support": "^0.4.2",
     "split-lines": "^1.0.0",
     "standard": "^8.0.0",
-    "standard-version": "^2.4.0",
+    "standard-version": "^3.0.0",
     "tap": "^7.0.0",
     "which": "^1.2.11",
     "zero-fill": "^2.2.3"