Update material-ui peer dependency to <1.0.0.

If anything breaks with 0.x.x releases in the future, that should be considered a bug. #110

Author: leMaik

package.json

@@ -38,14 +38,14 @@
     "babel-preset-es2015": "^6.14.0",
     "babel-preset-react": "^6.11.1",
     "babel-preset-stage-0": "^6.5.0",
-    "material-ui": "^0.17.0",
+    "material-ui": "^0.18.0",
     "react": "^15.4.0",
     "react-dom": "^15.4.0",
     "react-tap-event-plugin": "^2.0.0",
     "standard": "^10.0.2"
   },
   "peerDependencies": {
-    "material-ui": ">= 0.15.0 <= 0.17.x",
+    "material-ui": ">= 0.15.0 < 1.0.0",
     "react": "^15.3.2",
     "react-dom": "^15.3.2",
     "react-tap-event-plugin": "^1.0.0 || ^2.0.0"