Update dependencies

package.json

@@ -60,7 +60,7 @@
     "flatted": "^2.0.1",
     "next-utils": "^0.1.3",
     "prop-types": "^15.6.2",
-    "react-contentful": "^1.5.1",
+    "react-contentful": "^2.0.4",
     "react-hoc-helpers": "^0.1.4"
   },
   "devDependencies": {
@@ -77,7 +77,7 @@
     "babel-plugin-transform-react-remove-prop-types": "^0.4.24",
     "babel-polyfill": "^6.26.0",
     "coveralls": "^3.0.9",
-    "dtslint": "^2.0.6",
+    "dtslint": "^3.3.0",
     "enzyme": "^3.11.0",
     "enzyme-adapter-react-16": "^1.15.2",
     "greenkeeper-lockfile": "^1.15.1",