Update ESLint and related

package.json

@@ -163,7 +163,7 @@
   },
   "devDependencies": {
     "@babel/plugin-transform-modules-commonjs": "^7.10.1",
-    "@gitlab/eslint-plugin": "7.0.3",
+    "@gitlab/eslint-plugin": "8.0.0",
     "@testing-library/dom": "^7.16.2",
     "@vue/test-utils": "1.1.2",
     "acorn": "^6.3.0",
@@ -175,8 +175,8 @@
     "commander": "^2.18.0",
     "custom-jquery-matchers": "^2.1.0",
     "docdash": "^1.0.2",
-    "eslint": "^6.8.0",
-    "eslint-import-resolver-jest": "^2.1.1",
+    "eslint": "7.19.0",
+    "eslint-import-resolver-jest": "3.0.0",
     "eslint-import-resolver-webpack": "^0.12.1",
     "eslint-plugin-jasmine": "^4.1.0",
     "eslint-plugin-no-jquery": "^2.3.0",