Add lint support through leveraging "ESLint"

.eslintrc.js

@@ -0,0 +1,16 @@
+module.exports = {
+  parser: "@typescript-eslint/parser",
+  plugins: ["@typescript-eslint"],
+  parserOptions: {
+    sourceType: "module",
+  },
+
+  /**
+   * ESLint rules
+   *
+   * All available rules: http://eslint.org/docs/rules/
+   */
+  rules: {
+    "no-extra-semi": "error",
+  },
+};

.gitignore

@@ -39,3 +39,5 @@ node_modules
 # OSX
 .DS_Store
 
+# ESlint Cache
+.eslintcache

api/WebApi.ts

@@ -76,7 +76,7 @@ export function getHandlerFromToken(token: string, allowCrossOriginAuthenticatio
 export interface IWebApiRequestSettings {
     productName: string,
     productVersion: string
-};
+}
 
 // ---------------------------------------------------------------------------
 // Factory to return client apis

api/interfaces/common/VsoBaseInterfaces.ts

@@ -47,7 +47,7 @@ export interface ApiResourceLocation {
     routeTemplate: string;
 }
 
-export interface IHeaders { [key: string]: any };
+export interface IHeaders { [key: string]: any }
 
 export interface IBasicCredentials {
     username: string;

azure-pipelines.yml

@@ -33,6 +33,11 @@ steps:
 - script: npm run units
   displayName: Run unit tests
 
+- script: npm run lint
+  displayName: Run lint (ESlint)
+  # Only perform linting for Higher than Node 12
+  condition: and(succeeded(), eq(variables['versionSpec'], '12.x', '14.x', '16.x'))
+
 # For CI runs on master, automatically publish packages
 - bash: |
       echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > .npmrc