Node version updated (#159)

* Node version updated

* Fixed the problem of building the project

* Extra spaces removed

kafka-ui-react-app/.nvmrc

@@ -1 +1 @@
-v12.13.1
+v14.15.4

kafka-ui-react-app/package.json

@@ -98,5 +98,8 @@
     "react-scripts": "4.0.1",
     "typescript": "~4.1.2"
   },
+  "engines": {
+    "node": ">=14.15.4"
+  },
   "proxy": "http://localhost:8080"
 }

pom.xml

@@ -20,7 +20,7 @@
 		<git.revision>latest</git.revision>
 		<zkclient.version>0.11</zkclient.version>
 		<kafka-clients.version>2.4.0</kafka-clients.version>
-		<node.version>v12.13.1</node.version>
+		<node.version>v14.15.4</node.version>
 		<dockerfile-maven-plugin.version>1.4.10</dockerfile-maven-plugin.version>
 		<frontend-maven-plugin.version>1.8.0</frontend-maven-plugin.version>
 		<maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>