Bump ng2-charts from 3.1.2 to 7.0.0

Bumps [ng2-charts](https://github.com/valor-software/ng2-charts) from 3.1.2 to 7.0.0.
- [Release notes](https://github.com/valor-software/ng2-charts/releases)
- [Commits](valor-software/ng2-charts@v3.1.2...v7.0.0)

---
updated-dependencies:
- dependency-name: ng2-charts
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -25,7 +25,7 @@
     "jquery": "^3.7.1",
     "material-design-icons": "3.0.1",
     "materialize-css": "1.0.0",
-    "ng2-charts": "^3.1.2",
+    "ng2-charts": "^7.0.0",
     "rxjs": "7.8.1",
     "ts-loader": "^9.5.1",
     "webpack-node-externals": "^3.0.0",