Update chart.js dependency (#31)

Author: kurkle

package-lock.json

@@ -29,7 +29,7 @@
   ],
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^11.2.0",
-    "chart.js": "^3.0.0-beta.13",
+    "chart.js": "^3.0.0",
     "chartjs-test-utils": "^0.2.2",
     "concurrently": "^6.0.0",
     "cross-env": "^7.0.3",
@@ -49,7 +49,7 @@
     "rollup-plugin-terser": "^7.0.2"
   },
   "peerDependencies": {
-    "chart.js": "^3.0.0-beta.13"
+    "chart.js": "^3.0.0"
   },
   "dependencies": {}
 }