chore(deps): pin dependencies (#32561)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

apps/demos/package.json

@@ -89,7 +89,7 @@
         "zone.js": "0.15.1"
     },
     "devDependencies": {
-        "@angular/platform-server": "~21.1.0",
+        "@angular/platform-server": "21.1.6",
         "@babel/core": "7.28.6",
         "@babel/eslint-parser": "catalog:",
         "@babel/preset-env": "7.28.6",

packages/devextreme-themebuilder/package.json

@@ -50,7 +50,7 @@
     "express": "4.22.1",
     "filing-cabinet": "4.1.6",
     "fs-extra": "11.2.0",
-    "immutable": "^5.1.5",
+    "immutable": "5.1.5",
     "precinct": "11.0.5",
     "sinon": "18.0.1",
     "ts-jest": "29.1.2",

packages/devextreme/package.json

@@ -84,9 +84,9 @@
     "@jest/globals": "29.7.0",
     "@stylistic/eslint-plugin": "catalog:",
     "@testcafe-community/axe": "3.5.0",
-    "@testing-library/dom": "^10.4.0",
-    "@testing-library/jest-dom": "^6.6.3",
-    "@testing-library/user-event": "^14.5.2",
+    "@testing-library/dom": "10.4.0",
+    "@testing-library/jest-dom": "6.6.3",
+    "@testing-library/user-event": "14.5.2",
     "@types/enzyme": "3.10.19",
     "@types/jquery": "catalog:",
     "@types/react": "16.14.69",