Convert CRA project to re-distributable component package.

react-component-package.patch

diff --git a/.gitignore b/.gitignore
index 4d29575..3835823 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,6 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+/dist
+/yarn.lock
diff --git a/package.json b/package.json
index 1da6187..be3be0b 100644
--- a/package.json
+++ b/package.json
@@ -3,16 +3,40 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
+    "@babel/cli": "^7.6.2",
+    "@babel/core": "^7.6.2",
+    "@babel/preset-env": "^7.6.2",
+    "@babel/preset-react": "^7.0.0"
+  },
+  "peerDependencies": {
+    "react": "^16.8.0",
+    "react-dom": "^16.8.0"
+  },
+  "devDependencies": {
     "react": "^16.10.2",
     "react-dom": "^16.10.2",
     "react-scripts": "3.2.0"
   },
   "scripts": {
     "start": "react-scripts start",
-    "build": "react-scripts build",
+    "prepublish": "npm run build",
+    "postinstall": "test -d src && npm run build",
+    "build": "rm -rf dist && NODE_ENV=production babel src/lib --out-dir dist --copy-files --ignore __tests__,spec.js,test.js,__snapshots__",
     "test": "react-scripts test",
     "eject": "react-scripts eject"
   },
+  "main": "dist/index.js",
+  "module": "dist/index.js",
+  "files": [
+    "dist/*",
+    "README.md"
+  ],
+  "babel": {
+    "presets": [
+      "@babel/env",
+      "@babel/react"
+    ]
+  },
   "eslintConfig": {
     "extends": "react-app"
   },

Patch a React App project to be a re-distributable React Component project.

patch -p1 < react-component-package.patch 
git rm --cached yarn.lock
yarn