Use SVG for logo.

php/class-plugin.php

@@ -531,12 +531,12 @@ public function admin_notice() {
 		}
 
 		$class   = 'notice notice-warning is-dismissible';
-		$logo    = $this->asset_url( 'assets/images/logo.png' );
+		$logo    = $this->asset_url( 'assets/images/logo.svg' );
 		$title   = esc_html__( 'Unsplash', 'unsplash' );
 		$message = esc_html__( 'To complete set up of the Unsplash plugin you’ll need to add the API access key.', 'unsplash' );
 		$button  = esc_html__( 'Complete setup', 'unsplash' );
 		$url     = get_admin_url( null, 'options-general.php?page=unsplash' );
 
-		printf( '<div class="%1$s"><h3><img src="%2$s" height="14" "/>   %3$s</h3><p>%4$s</p><p><a href="%5$s" class="button button-primary button-large">%6$s</a></p></div>', esc_attr( $class ), esc_url( $logo ), esc_html( $title ), esc_html( $message ), esc_url( $url ), esc_html( $button ) );
+		printf( '<div class="%1$s"><h3><img src="%2$s" height="18" "/>   %3$s</h3><p>%4$s</p><p><a href="%5$s" class="button button-primary button-large">%6$s</a></p></div>', esc_attr( $class ), esc_url( $logo ), esc_html( $title ), esc_html( $message ), esc_url( $url ), esc_html( $button ) );
 	}
 }

php/class-settings.php

@@ -234,7 +234,7 @@ public function sanitize_settings( $settings ) {
 	 * Renders the entire settings page.
 	 */
 	public function settings_page_render() {
-		$logo = $this->plugin->asset_url( 'assets/images/logo.png' );
+		$logo = $this->plugin->asset_url( 'assets/images/logo.svg' );
 		$auth = get_option( 'unsplash_auth' );
 		if ( ! empty( $auth['message'] ) ) {
 			printf( '<div class="%s notice is-dismissible"><p>%s</p></div>', esc_attr( $auth['type'] ), esc_html( $auth['message'] ) );
@@ -250,7 +250,7 @@ public function settings_page_render() {
 				margin-bottom: 20px;
 			}
 		</style>
-		<h1><img src="<?php echo esc_url( $logo ); ?>" height="20" />  <?php esc_html_e( 'Unsplash', 'unsplash' ); ?></h1>
+		<h1><img src="<?php echo esc_url( $logo ); ?>" height="26" />  <?php esc_html_e( 'Unsplash', 'unsplash' ); ?></h1>
 		<p><i><?php esc_html_e( 'Search the internet’s source of freely usable images.', 'unsplash' ); ?></i></p><br />
 		<h1><?php esc_html_e( 'General Settings', 'unsplash' ); ?></h1>
 		<?php