Update template devDependencies (#30489)

Summary:
Update template devDependencies before 0.64.0 release

[JavaScript] [Changed] - Update devDependencies (`babel/core` to `7.12.9`, `babel/runtime` to `7.12.5`, `react-native-community/eslint-config` to `2.0.0`, `babel-jest` to `26.6.3`, `eslint` to `7.14.0` and `jest` to `26.6.3`)

Pull Request resolved: #30489

Test Plan:
- [ ] Check babel
- [ ] Check eslint
- [ ] Check jest

Reviewed By: lunaleaps

Differential Revision: D25377357

Pulled By: TheSavior

fbshipit-source-id: fd8e1992860a7fbae710898fbee249e9c36d2229

Author: Bardiamist

template/package.json

@@ -14,12 +14,12 @@
     "react-native": "0.64.0-rc.1"
   },
   "devDependencies": {
-    "@babel/core": "^7.8.4",
-    "@babel/runtime": "^7.8.4",
-    "@react-native-community/eslint-config": "^1.1.0",
-    "babel-jest": "^25.1.0",
-    "eslint": "^6.5.1",
-    "jest": "^25.1.0",
+    "@babel/core": "^7.12.9",
+    "@babel/runtime": "^7.12.5",
+    "@react-native-community/eslint-config": "^2.0.0",
+    "babel-jest": "^26.6.3",
+    "eslint": "7.14.0",
+    "jest": "^26.6.3",
     "metro-react-native-babel-preset": "^0.64.0",
     "react-native-codegen": "^0.0.6",
     "react-test-renderer": "17.0.1"