Add lint rule for license in js files

Change-Id: Icced042c376e4bb7f8c98f2c01875a5427411ad2

package.json

@@ -9,7 +9,7 @@
     "eslint": "^6.6.0",
     "eslint-config-google": "^0.13.0",
     "eslint-plugin-html": "^6.0.0",
-    "eslint-plugin-jsdoc": "^18.4.3",
+    "eslint-plugin-jsdoc": "^19.2.0",
     "fried-twinkie": "^0.2.2",
     "polymer-cli": "^1.9.11",
     "typescript": "^3.7.4",

polygerrit-ui/app/.eslintrc.json

@@ -123,8 +123,24 @@
     "jsdoc/require-returns-check": 0,
     "jsdoc/require-returns-description": 0,
     "jsdoc/require-returns-type": 2,
-    "jsdoc/valid-types": 2
+    "jsdoc/valid-types": 2,
+    "jsdoc/require-file-overview": ["error", {
+      "tags": {
+        "license": {
+          "mustExist": true,
+          "preventDuplicates": true
+        }
+      }
+    }]
   },
+  "overrides": [
+    {
+      "files": ["*.html", "test.js", "test-infra.js", "template_test.js"],
+      "rules": {
+        "jsdoc/require-file-overview": "off"
+      }
+    }
+  ],
   "plugins": [
     "html",
     "jsdoc"

yarn.lock

@@ -3281,10 +3281,10 @@ eslint-plugin-html@^6.0.0:
   dependencies:
     htmlparser2 "^3.10.1"
 
-eslint-plugin-jsdoc@^18.4.3:
-  version "18.11.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-jsdoc/-/eslint-plugin-jsdoc-18.11.0.tgz#724e6aa35f01c7f80629b2e313b007422cc159af"
-  integrity sha512-24J2+eK2ZHZ1KvpKcoOEir2k4xJKfPzZ1JC9PToi8y8Tn59T8TVVSNRTTRzsDdiaQeIbehApB3KxqIfJG8o7hg==
+eslint-plugin-jsdoc@^19.2.0:
+  version "19.2.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-jsdoc/-/eslint-plugin-jsdoc-19.2.0.tgz#f522b970878ae402b28ce62187305b33dfe2c834"
+  integrity sha512-QdNifBFLXCDGdy+26RXxcrqzEZarFWNybCZQVqJQYEYPlxd6lm+LPkrs6mCOhaGc2wqC6zqpedBQFX8nQJuKSw==
   dependencies:
     comment-parser "^0.7.2"
     debug "^4.1.1"