Upgrade hallmark devDependency from ^0.1.0 to ^1.0.0 (#172)

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "airtap": "^2.0.0",
     "coveralls": "^3.0.2",
     "dependency-check": "^3.3.0",
-    "hallmark": "^0.1.0",
+    "hallmark": "^1.0.0",
     "level-community": "^3.0.0",
     "level-concat-iterator": "^2.0.0",
     "nyc": "^14.0.0",