Bump chart.js from 2.7.3 to 2.8.0

Bumps [chart.js](https://github.com/chartjs/Chart.js) from 2.7.3 to 2.8.0.
- [Release notes](https://github.com/chartjs/Chart.js/releases)
- [Commits](https://github.com/chartjs/Chart.js/compare/v2.7.3...v2.8.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -14,7 +14,7 @@
     "autosize": "^3.0.20",
     "axios": "^0.18",
     "bootstrap-sass": "^3.4.1",
-    "chart.js": "^2.7.0",
+    "chart.js": "^2.8.0",
     "cross-env": "^5.1",
     "es5-shim": "^4.5.9",
     "flatpickr": "^4.5.7",

yarn.lock

@@ -1271,10 +1271,10 @@ charenc@~0.0.1:
   resolved "https://registry.yarnpkg.com/charenc/-/charenc-0.0.2.tgz#c0a1d2f3a7092e03774bfa83f14c0fc5790a8667"
   integrity sha1-wKHS86cJLgN3S/qD8UwPxXkKhmc=
 
-chart.js@^2.7.0:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-2.7.3.tgz#cdb61618830bf216dc887e2f7b1b3c228b73c57e"
-  integrity sha512-3+7k/DbR92m6BsMUYP6M0dMsMVZpMnwkUyNSAbqolHKsbIzH2Q4LWVEHHYq7v0fmEV8whXE0DrjANulw9j2K5g==
+chart.js@^2.8.0:
+  version "2.8.0"
+  resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-2.8.0.tgz#b703b10d0f4ec5079eaefdcd6ca32dc8f826e0e9"
+  integrity sha512-Di3wUL4BFvqI5FB5K26aQ+hvWh8wnP9A3DWGvXHVkO13D3DSnaSsdZx29cXlEsYKVkn1E2az+ZYFS4t0zi8x0w==
   dependencies:
     chartjs-color "^2.1.0"
     moment "^2.10.2"