chore: Upgrade to Babel 7

.babelrc

@@ -1,14 +1,12 @@
 {
   "presets": [
-    ["env", {
-      "loose": true
-    }],
-    "stage-1",
-    "react"
+    ["@4c", {
+      "runtime": true,
+      "corejs": 2,
+      "targets": {}
+    }]
   ],
   "plugins": [
-    "dev-expression",
-    "transform-runtime", // Need stage-3 Symbol polyfill.
     "add-module-exports"
   ]
 }

package.json

@@ -8,7 +8,7 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "scripts": {
-    "build": "rimraf lib && babel src -d lib && cpy types/*.d.ts lib",
+    "build": "babel src -d lib --delete-dir-on-start && cpy types/*.d.ts lib",
     "format": "eslint --fix . && npm run prettier -- --write",
     "lint": "eslint . && npm run prettier -- -l",
     "prepublish": "npm run build",
@@ -53,6 +53,10 @@
     ],
     "setupFiles": [
       "<rootDir>/test/setup.js"
+    ],
+    "testPathIgnorePatterns": [
+      "/node_modules/",
+      "<rootDir>/types/"
     ]
   },
   "repository": {
@@ -72,8 +76,8 @@
   },
   "homepage": "https://github.com/4Catalyzer/found#readme",
   "dependencies": {
-    "babel-runtime": "^6.26.0",
-    "farce": "^0.2.7",
+    "@babel/runtime-corejs2": "^7.4.0",
+    "farce": "^0.2.8",
     "is-promise": "^2.1.0",
     "lodash": "^4.17.11",
     "path-to-regexp": "^1.7.0",
@@ -87,18 +91,14 @@
     "react": ">=16.4.0"
   },
   "devDependencies": {
+    "@4c/babel-preset": "^5.0.4",
+    "@babel/cli": "^7.2.3",
+    "@babel/core": "^7.4.0",
     "@types/react": "^16.8.8",
     "@types/react-dom": "^16.8.2",
-    "babel-cli": "^6.26.0",
-    "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.1",
-    "babel-jest": "^23.6.0",
+    "babel-jest": "^24.5.0",
     "babel-plugin-add-module-exports": "^1.0.0",
-    "babel-plugin-dev-expression": "^0.2.1",
-    "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-env": "^1.7.0",
-    "babel-preset-react": "^6.24.1",
-    "babel-preset-stage-1": "^6.24.1",
     "codecov": "^3.2.0",
     "cpy-cli": "^2.0.0",
     "delay": "^4.1.0",
@@ -107,16 +107,16 @@
     "enzyme": "^3.9.0",
     "enzyme-adapter-react-16": "^1.11.2",
     "eslint": "^5.15.3",
-    "eslint-config-4catalyzer-jest": "^1.2.0",
-    "eslint-config-4catalyzer-react": "^0.9.2",
+    "eslint-config-4catalyzer-jest": "^1.2.1",
+    "eslint-config-4catalyzer-react": "^0.9.3",
     "eslint-config-prettier": "^4.1.0",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-jest": "^22.4.1",
     "eslint-plugin-jsx-a11y": "^6.2.1",
     "eslint-plugin-prettier": "^3.0.1",
     "eslint-plugin-react": "^7.12.4",
     "husky": "^1.3.1",
-    "jest": "^23.6.0",
+    "jest": "^24.5.0",
     "lint-staged": "^8.1.5",
     "p-defer": "^2.0.0",
     "prettier": "^1.16.4",
@@ -126,6 +126,6 @@
     "react-stand-in": "^4.0.0-beta.14",
     "react-test-renderer": "^16.8.4",
     "rimraf": "^2.6.3",
-    "typescript": "^3.3.3333"
+    "typescript": "^3.3.4000"
   }
 }

src/Matcher.js

@@ -112,7 +112,7 @@ export default class Matcher {
       return null;
     }
 
-    const params = Object.create(null);
+    const params = {};
     keys.forEach(({ name }, index) => {
       const value = match[index + 1];
       params[name] = value && decodeURIComponent(value);
@@ -153,7 +153,7 @@ export default class Matcher {
         Object.keys(routeMatch.groups).join(', '),
       );
 
-      const routeIndices = {};
+      const groupRouteIndices = {};
       const routeParams = [];
       const params = {};
 
@@ -163,7 +163,7 @@ export default class Matcher {
 
           // Retain the nested group structure for route indices so we can
           // reconstruct the element tree from flattened route elements.
-          routeIndices[groupName] = groupPayload.routeIndices;
+          groupRouteIndices[groupName] = groupPayload.routeIndices;
 
           // Flatten route groups for route params matching getRoutesFromIndices
           // below.
@@ -174,7 +174,11 @@ export default class Matcher {
         },
       );
 
-      return { routeIndices, routeParams, params };
+      return {
+        routeIndices: [groupRouteIndices],
+        routeParams,
+        params,
+      };
     }
 
     const { index, params } = routeMatch;

src/createBaseRouter.js

@@ -118,8 +118,6 @@ export default function createBaseRouter({
       const pendingMatch = this.props.match;
 
       try {
-        // ESLint doesn't handle for-await yet.
-        // eslint-disable-next-line semi
         for await (const renderArgs of resolveRenderArgs(this.props)) {
           if (!this.mounted || this.props.match !== pendingMatch) {
             return;

src/getRenderArgs.js

@@ -3,8 +3,6 @@ import resolveRenderArgs from './utils/resolveRenderArgs';
 export default async function getRenderArgs(props) {
   let elements;
 
-  // ESLint doesn't handle for-await yet.
-  // eslint-disable-next-line semi
   for await (elements of resolveRenderArgs(props)) {
     // Nothing to do here. We just need the last value from the iterable.
   }