Update @babel deps (#11072)

package.json

@@ -10,23 +10,23 @@
     "test": "make test"
   },
   "devDependencies": {
-    "@babel/cli": "^7.7.0",
-    "@babel/core": "^7.7.2",
+    "@babel/cli": "^7.8.4",
+    "@babel/core": "^7.8.4",
     "@babel/eslint-plugin-development": "^1.0.1",
-    "@babel/plugin-proposal-class-properties": "^7.7.0",
-    "@babel/plugin-proposal-export-namespace-from": "^7.5.2",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.4.4",
-    "@babel/plugin-proposal-numeric-separator": "^7.2.0",
-    "@babel/plugin-proposal-object-rest-spread": "^7.7.4",
-    "@babel/plugin-proposal-optional-chaining": "^7.6.0",
-    "@babel/plugin-transform-flow-strip-types": "^7.7.4",
-    "@babel/plugin-transform-for-of": "^7.7.4",
-    "@babel/plugin-transform-modules-commonjs": "^7.7.0",
-    "@babel/plugin-transform-runtime": "^7.6.2",
-    "@babel/preset-env": "^7.7.1",
-    "@babel/preset-flow": "^7.0.0",
-    "@babel/register": "^7.7.0",
-    "@babel/runtime": "^7.7.2",
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
+    "@babel/plugin-proposal-export-namespace-from": "^7.8.3",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.8.3",
+    "@babel/plugin-proposal-numeric-separator": "^7.8.3",
+    "@babel/plugin-proposal-object-rest-spread": "^7.8.3",
+    "@babel/plugin-proposal-optional-chaining": "^7.8.3",
+    "@babel/plugin-transform-flow-strip-types": "^7.8.3",
+    "@babel/plugin-transform-for-of": "^7.8.4",
+    "@babel/plugin-transform-modules-commonjs": "^7.8.3",
+    "@babel/plugin-transform-runtime": "^7.8.3",
+    "@babel/preset-env": "^7.8.4",
+    "@babel/preset-flow": "^7.8.3",
+    "@babel/register": "^7.8.3",
+    "@babel/runtime": "^7.8.4",
     "@rollup/plugin-alias": "^2.2.0",
     "@rollup/plugin-json": "^4.0.0",
     "babel-eslint": "^11.0.0-beta.2",