Update babel monorepo to v7.7.4

Author: renovate-bot

package.json

@@ -36,13 +36,13 @@
     "postbump": "yarn build:packages"
   },
   "devDependencies": {
-    "@babel/core": "7.7.2",
-    "@babel/plugin-proposal-class-properties": "7.7.0",
-    "@babel/plugin-proposal-object-rest-spread": "7.6.2",
-    "@babel/plugin-transform-runtime": "7.6.2",
-    "@babel/preset-env": "7.7.1",
-    "@babel/preset-react": "7.7.0",
-    "@babel/preset-typescript": "7.7.2",
+    "@babel/core": "7.7.4",
+    "@babel/plugin-proposal-class-properties": "7.7.4",
+    "@babel/plugin-proposal-object-rest-spread": "7.7.4",
+    "@babel/plugin-transform-runtime": "7.7.4",
+    "@babel/preset-env": "7.7.4",
+    "@babel/preset-react": "7.7.4",
+    "@babel/preset-typescript": "7.7.4",
     "@pika/pack": "0.5.0",
     "@pika/plugin-build-node": "0.7.1",
     "@pika/plugin-build-types": "0.7.1",