fix: use --open-page without explicitly mentioning --open

Author: snitin315

lib/utils/normalizeOptions.js

@@ -112,6 +112,11 @@ function normalizeOptions(compiler, options) {
   if (typeof options.setupExitSignals === 'undefined') {
     options.setupExitSignals = true;
   }
+
+  // normalize open option
+  if (typeof options.openPage !== 'undefined' && typeof options.open === 'undefined') {
+    options.open = true;
+  }
 }
 
 module.exports = normalizeOptions;