upgrade dependencies

Author: sgratzl

package.json

@@ -25,19 +25,19 @@
     "src/**/*.js"
   ],
   "dependencies": {
-    "chart.js": "^2.7.2"
+    "chart.js": "^2.7.3"
   },
   "devDependencies": {
-    "babel-core": "^6.26.0",
+    "babel-core": "^6.26.3",
     "babel-plugin-external-helpers": "^6.22.0",
-    "babel-preset-env": "^1.6.1",
-    "eslint": "^3.19.0",
-    "package-preamble": "0.0",
-    "rimraf": "^2.6.2",
-    "rollup": "^0.55.3",
-    "rollup-plugin-babel": "^3.0.3",
-    "rollup-plugin-commonjs": "^8.3.0",
-    "rollup-plugin-node-resolve": "^3.0.2",
+    "babel-preset-env": "^1.7.0",
+    "eslint": "^5.15.1",
+    "package-preamble": "0.1",
+    "rimraf": "^2.6.3",
+    "rollup": "^1.6.0",
+    "rollup-plugin-babel": "^4.3.2",
+    "rollup-plugin-commonjs": "^9.2.1",
+    "rollup-plugin-node-resolve": "^4.0.1",
     "uglify-es": "^3.3.9"
   },
   "scripts": {