Replace opn by open lib

__tests__/commands/phpmyadmin.ts

@@ -3,7 +3,6 @@
  * External dependencies
  */
 import { beforeEach, describe, expect, it, jest } from '@jest/globals';
-import opn from 'opn';
 
 /**
  * Internal dependencies
@@ -23,7 +22,6 @@ const mutationMock = jest.fn( async () => {
 } );
 
 jest.mock( '../../src/lib/api' );
-jest.mock( 'opn' );
 jest.mocked( API ).mockImplementation( () => {
 	return Promise.resolve( {
 		mutate: mutationMock,
@@ -38,6 +36,11 @@ describe( 'commands/PhpMyAdminCommand', () => {
 		const env = { id: 456, jobs: [] };
 		const tracker = jest.fn() as CommandTracker;
 		const cmd = new PhpMyAdminCommand( app, env, tracker );
+		const openUrl = jest.spyOn( cmd, 'openUrl' );
+
+		beforeEach( () => {
+			openUrl.mockReset();
+		} );
 
 		it( 'should generate a URL by calling the right mutation', async () => {
 			await cmd.run();
@@ -50,9 +53,10 @@ describe( 'commands/PhpMyAdminCommand', () => {
 				},
 			} );
 		} );
+
 		it( 'should open the generated URL in browser', async () => {
 			await cmd.run();
-			expect( opn ).toHaveBeenCalledWith( 'http://test-url.com', { wait: false } );
+			expect( openUrl ).toHaveBeenCalledWith( 'http://test-url.com' );
 		} );
 	} );
 } );

src/commands/phpmyadmin.ts

@@ -4,7 +4,6 @@
 import chalk from 'chalk';
 import { GraphQLFormattedError } from 'graphql';
 import gql from 'graphql-tag';
-import opn from 'opn';
 
 /**
  * Internal dependencies
@@ -66,6 +65,11 @@ export class PhpMyAdminCommand {
 		console.log( msg );
 	}
 
+	async openUrl( url: string ) {
+		const { default: open } = await import( 'open' );
+		void open( url, { wait: false } );
+	}
+
 	async run( silent = false ) {
 		this.silent = silent;
 
@@ -92,9 +96,7 @@ export class PhpMyAdminCommand {
 			} );
 			exit.withError( `Failed to generate PhpMyAdmin URL: ${ error.message }` );
 		}
-
-		// eslint-disable-next-line @typescript-eslint/no-unsafe-call
-		void opn( url, { wait: false } );
+		void this.openUrl( url );
 		this.log( 'PhpMyAdmin is opened in your default browser.' );
 	}
 }