build: enable TSLint on the packages folder (#18459)

porting PRs #18392 and #18441 to 4.x

tools/gulp-tasks/lint.js

@@ -9,9 +9,13 @@ module.exports = (gulp) => () => {
         // todo(vicb): add .js files when supported
         // see https://github.com/palantir/tslint/pull/1515
         './modules/**/*.ts',
+        './packages/**/*.ts',
         './tools/**/*.ts',
         './*.ts',
 
+        // Ignore node_modules directories
+        '!**/node_modules/**',
+
         // Ignore TypeScript mocks because it's not managed by us
         '!./tools/@angular/tsc-wrapped/test/typescript.mocks.ts',
 

tools/public_api_guard/forms/forms.d.ts

@@ -144,9 +144,6 @@ export declare class DefaultValueAccessor implements ControlValueAccessor {
     onChange: (_: any) => void;
     onTouched: () => void;
     constructor(_renderer: Renderer2, _elementRef: ElementRef, _compositionMode: boolean);
-    _compositionEnd(value: any): void;
-    _compositionStart(): void;
-    _handleInput(value: any): void;
     registerOnChange(fn: (_: any) => void): void;
     registerOnTouched(fn: () => void): void;
     setDisabledState(isDisabled: boolean): void;