build: remove plugins that already exist on preset-env (#550)

simplify babel

.babelrc

@@ -8,10 +8,7 @@
   "plugins": [
     "@babel/plugin-proposal-export-namespace-from",
     "@babel/plugin-proposal-export-default-from",
-    "@babel/plugin-syntax-dynamic-import",
     "@babel/plugin-transform-flow-strip-types",
-    "@babel/plugin-transform-property-mutators",
-    "@babel/plugin-proposal-object-rest-spread",
     [
       "@babel/plugin-proposal-decorators",
       {
@@ -25,8 +22,19 @@
         "pragma": "h",
         "pragmaFrag": "Fragment"
       }
-    ],
-    "@babel/plugin-transform-classes"
+    ]
   ],
-  "presets": ["@babel/preset-env", "@babel/preset-flow"]
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "loose": true,
+        "bugfixes": true,
+        "targets": {
+          "browsers": ["chrome >= 47", "firefox >= 51", "ie >= 11", "safari >= 8", "ios >= 8", "android >= 4"]
+        }
+      }
+    ],
+    "@babel/preset-flow"
+  ]
 }

package.json

@@ -44,12 +44,8 @@
     "@babel/plugin-proposal-decorators": "^7.10.5",
     "@babel/plugin-proposal-export-default-from": "^7.10.4",
     "@babel/plugin-proposal-export-namespace-from": "^7.10.4",
-    "@babel/plugin-proposal-object-rest-spread": "^7.10.4",
-    "@babel/plugin-syntax-dynamic-import": "^7.8.3",
-    "@babel/plugin-transform-classes": "^7.10.4",
     "@babel/plugin-transform-flow-strip-types": "^7.10.4",
     "@babel/plugin-transform-modules-commonjs": "^7.10.4",
-    "@babel/plugin-transform-property-mutators": "^7.10.4",
     "@babel/plugin-transform-react-jsx": "^7.10.4",
     "@babel/preset-env": "^7.10.4",
     "@babel/preset-flow": "^7.10.4",

yarn.lock

@@ -425,7 +425,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.10.4"
 
-"@babel/plugin-syntax-dynamic-import@^7.8.0", "@babel/plugin-syntax-dynamic-import@^7.8.3":
+"@babel/plugin-syntax-dynamic-import@^7.8.0":
   version "7.8.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-dynamic-import/-/plugin-syntax-dynamic-import-7.8.3.tgz#62bf98b2da3cd21d626154fc96ee5b3cb68eacb3"
   integrity sha512-5gdGbFon+PszYzqs83S3E5mpi7/y/8M9eC90MRTZfduQOYW76ig6SOSPNe41IG5LoP3FGBn2N0RjVDSQiS94kQ==
@@ -701,14 +701,6 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.10.4"
 
-"@babel/plugin-transform-property-mutators@^7.10.4":
-  version "7.10.4"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-property-mutators/-/plugin-transform-property-mutators-7.10.4.tgz#ee8555609d717b7f73e5b9cd161adf003a0f40ea"
-  integrity sha512-9+qPYEpJvBjpcZDLffYybBTl7nZmk0sK0wkwsZQK6rvgGHnxpk9mAvFGV3h11/1UeJe1uXwXdY0HsstnCBZGGw==
-  dependencies:
-    "@babel/helper-define-map" "^7.10.4"
-    "@babel/helper-plugin-utils" "^7.10.4"
-
 "@babel/plugin-transform-react-jsx@^7.10.4":
   version "7.10.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-react-jsx/-/plugin-transform-react-jsx-7.10.4.tgz#673c9f913948764a4421683b2bef2936968fddf2"