build(deps-dev): bump eslint from 6.8.0 to 7.15.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.8.0 to 7.15.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.8.0...v7.15.0)

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

package.json

@@ -62,7 +62,7 @@
     "@types/semver": "^7.3.4",
     "@typescript-eslint/eslint-plugin": "^4.8.2",
     "@typescript-eslint/parser": "^4.8.2",
-    "eslint": "^6.8.0",
+    "eslint": "^7.15.0",
     "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-prettier": "^3.1.3",
     "generate-changelog": "^1.8.0",