fix(ajv): update to version 6.5.0 (#41)

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "@semantic-release/changelog": "2.0.2",
     "@semantic-release/git": "4.0.2",
     "@semantic-release/npm": "3.2.4",
-    "ajv": "6.4.0",
+    "ajv": "6.5.0",
     "ajv-keywords": "3.2.0",
     "codacy-coverage": "3.0.0",
     "commitplease": "3.2.0",