feat: add route and menu support for axis title color

Author: gururaj1512

lib/node_modules/@stdlib/plot/base/view/lib/browser/app/editor/config/axis.js

@@ -28,6 +28,7 @@ var resolveTextValue = require( './resolve_text_value.js' );
 // VARIABLES //
 
 var PROPS = [
+	'titleColor',
 	'titleFont',
 	'titleOpacity'
 ];

lib/node_modules/@stdlib/plot/base/view/lib/browser/app/schema/transforms/axis.js

@@ -30,6 +30,7 @@ var signalName = require( './../../utils/signal_name.js' );
 
 var PROPS = [
 	'title',
+	'titleColor',
 	'titleFont',
 	'titleOpacity'
 ];

lib/node_modules/@stdlib/plot/base/view/lib/browser/routes/app/bundle.js

@@ -37,6 +37,12 @@ function config() {
 			'default': '',
 			'type': 'string'
 		},
+		'titleColor': {
+			'description': 'color of the title',
+			'property': 'titleColor',
+			'default': '',
+			'type': 'string'
+		},
 		'titleFont': {
 			'description': 'font of the title',
 			'property': 'titleFont',