Fix grunt-eslint and semistandard versions

package.json

@@ -73,7 +73,7 @@
     "grunt-contrib-jst": "CartoDB/grunt-contrib-jst#merge-master",
     "grunt-contrib-uglify": "2.0.x",
     "grunt-contrib-watch": "1.0.0",
-    "grunt-eslint": "^20.1.0",
+    "grunt-eslint": "20.1.0",
     "grunt-exorcise": "2.1.1",
     "grunt-postcss": "0.7.2",
     "grunt-sass": "2.0.0",
@@ -87,7 +87,7 @@
     "prettysize": "0.0.3",
     "raw-loader": "0.5.1",
     "recursive-readdir": "2.1.1",
-    "semistandard": "^11.0.0",
+    "semistandard": "11.0.0",
     "semver": "4.3.6",
     "shim-loader": "0.1.0",
     "source-map-support": "0.4.0",