fix(material/testing): Rename MatButtonHarness "type" filter to

"buttonType" to avoid conflict with the reserved TS keyword

Author: wildcardalice

src/material/button/testing/button-harness-filters.ts

@@ -32,5 +32,5 @@ export interface ButtonHarnessFilters extends BaseHarnessFilters {
   disabled?: boolean;
 
   /** Only find instances with the specified type. */
-  type?: ButtonType;
+  buttonType?: ButtonType;
 }

src/material/button/testing/button-harness.spec.ts

@@ -60,7 +60,7 @@ describe('MatButtonHarness', () => {
   });
 
   it('should load button with type attribute', async () => {
-    const buttons = await loader.getAllHarnesses(MatButtonHarness.with({type: 'submit'}));
+    const buttons = await loader.getAllHarnesses(MatButtonHarness.with({buttonType: 'submit'}));
     expect(buttons.length).toBe(1);
     expect(await buttons[0].getText()).toBe('Submit button');
     expect(await buttons[0].getType()).toBe('submit');

src/material/button/testing/button-harness.ts

@@ -56,8 +56,8 @@ export class MatButtonHarness extends ContentContainerComponentHarness {
       .addOption('disabled', options.disabled, async (harness, disabled) => {
         return (await harness.isDisabled()) === disabled;
       })
-      .addOption('type', options.type, (harness, type) =>
-        HarnessPredicate.stringMatches(harness.getType(), type),
+      .addOption('buttonType', options.buttonType, (harness, buttonType) =>
+        HarnessPredicate.stringMatches(harness.getType(), buttonType),
       );
   }