chore: Upgrade Babel, Jest, Eslint (#1437)

* chore: Upgrade Prettier 1.8 -> 2.0

* chore: Upgrade Babel 6 -> 7

* chore: Upgrade eslint plugins

* chore: Add eslint import/order rules

* chore: Update flow-typed deps

.babelrc

@@ -1,18 +1,29 @@
 {
-  "presets": ["react", "env"],
+  "presets": [
+    "@babel/preset-react",
+    "@babel/preset-flow",
+    [
+      "@babel/preset-env",
+      {
+        "corejs": {
+          "version": "2",
+          "proposals": true
+        },
+        "useBuiltIns": "usage",
+      }
+    ]
+  ],
   "plugins": [
     "lodash",
     "styled-components",
-    "transform-decorators-legacy",
-    "transform-es2015-destructuring",
-    "transform-object-rest-spread",
-    "transform-regenerator",
-    "transform-class-properties",
-    "syntax-dynamic-import"
-  ],
-  "env": {
-    "development": {
-      "presets": ["react-hmre"]
-    }
-  }
-}
+    [
+      "@babel/plugin-proposal-decorators",
+      {
+        "legacy": true
+      }
+    ],
+    "@babel/plugin-transform-destructuring",
+    "@babel/plugin-transform-regenerator",
+    "transform-class-properties"
+  ]
+}