Update packages versions (#164)

Author: tar-g

packages/devextreme-cli/utility/latest-versions.js

@@ -1,7 +1,7 @@
 const packageJson = require('../package.json');
 module.exports = {
-    'devextreme': '19.2-stable',
-    'devextreme-react': '19.2-stable',
-    'devextreme-vue': '19.2.5',
+    'devextreme': '20.1-next',
+    'devextreme-react': '20.1-next',
+    'devextreme-vue': '20.1-next',
     'devextreme-cli': packageJson.version
 };

packages/devextreme-schematics/src/add-app-template/schema.json

@@ -39,7 +39,7 @@
     "dxversion": {
       "type": "string",
       "description": "The DevExtreme version",
-      "default": "latest"
+      "default": "20.1-next"
     },
     "empty": {
       "type": "boolean",

packages/devextreme-schematics/src/utility/latest-versions.ts

@@ -1,6 +1,6 @@
 // TODO: implement
 export const latestVersions = {
-  'devextreme': 'latest',
-  'devextreme-angular': 'latest',
-  'devextreme-cli': 'latest'
+  'devextreme': '20.1-next',
+  'devextreme-angular': '20.1-next',
+  'devextreme-cli': 'next'
 };