Bump chart.js from 2.7.2 to 2.9.4

Bumps [chart.js](https://github.com/chartjs/Chart.js) from 2.7.2 to 2.9.4.
- [Release notes](https://github.com/chartjs/Chart.js/releases)
- [Commits](https://github.com/chartjs/Chart.js/compare/v2.7.2...v2.9.4)

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

package.json

@@ -58,7 +58,7 @@
     "@susisu/mte-kernel": "^2.0.0",
     "aws-sdk": "^2.48.0",
     "aws-sdk-mobile-analytics": "^0.9.2",
-    "chart.js": "^2.7.2",
+    "chart.js": "^2.9.4",
     "codemirror": "^5.40.2",
     "codemirror-mode-elixir": "^1.1.1",
     "command-exists": "^1.2.9",

yarn.lock

@@ -1680,9 +1680,10 @@ chardet@^0.4.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.4.2.tgz#b5473b33dc97c424e5d98dc87d55d4d8a29c8bf2"
   integrity sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=
 
-chart.js@^2.7.2:
-  version "2.7.2"
-  resolved "http://registry.npm.taobao.org/chart.js/download/chart.js-2.7.2.tgz#3c9fde4dc5b95608211bdefeda7e5d33dffa5714"
+chart.js@^2.9.4:
+  version "2.9.4"
+  resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-2.9.4.tgz#0827f9563faffb2dc5c06562f8eb10337d5b9684"
+  integrity sha512-B07aAzxcrikjAPyV+01j7BmOpxtQETxTSlQ26BEYJ+3iUkbNKaOJ/nDbT6JjyqYxseM0ON12COHYdU2cTIjC7A==
   dependencies:
     chartjs-color "^2.1.0"
     moment "^2.10.2"
@@ -6642,14 +6643,10 @@ moment-mini@^2.22.1:
   resolved "https://registry.yarnpkg.com/moment-mini/-/moment-mini-2.22.1.tgz#bc32d73e43a4505070be6b53494b17623183420d"
   integrity sha512-OUCkHOz7ehtNMYuZjNciXUfwTuz8vmF1MTbAy59ebf+ZBYZO5/tZKuChVWCX+uDo+4idJBpGltNfV8st+HwsGw==
 
-moment@^2.10.2:
+moment@^2.10.2, moment@^2.10.3:
   version "2.22.2"
   resolved "http://registry.npm.taobao.org/moment/download/moment-2.22.2.tgz#3c257f9839fc0e93ff53149632239eb90783ff66"
 
-moment@^2.10.3:
-  version "2.22.1"
-  resolved "https://registry.yarnpkg.com/moment/-/moment-2.22.1.tgz#529a2e9bf973f259c9643d237fda84de3a26e8ad"
-
 mousetrap-global-bind@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/mousetrap-global-bind/-/mousetrap-global-bind-1.1.0.tgz#cd7de9222bd0646fa2e010d54c84a74c26a88edd"