fix(package): update micromatch to version 3.0.0 (#792)

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "js-yaml": "^3.3.1",
     "lodash": "^4.11.1",
     "mdast-util-inject": "^1.1.0",
-    "micromatch": "^2.1.6",
+    "micromatch": "^3.0.0",
     "mime": "^1.3.4",
     "module-deps-sortable": "4.0.6",
     "parse-filepath": "^1.0.1",