Setup multi-dist build with cjs, esm

TODO.md

@@ -1,4 +1,16 @@
 1. Write docs and examples
 2. Reduce testcase boilerplate code for similar tests
 3. Publish to npm
-4. Build some demo
+4. Build some demo
+
+5. Pack separate files
+
+Affected parts
+---------------
+a. Rollup config (input and output) X
+b. package.json entrypoints X
+c. root index.js for dynamic prod or dev redirection X
+d. change unpkg links in readme
+e. separate folder for types ?? (change tsconfig)
+
+f. Enable umd build from one index file