output mithril, stream and ospec esm versions on build - fixes #2112 (#2194)

* output mithril, stream and ospec esm versions on build

* Add esm bundles

* [request] Clearer error message for JSON deserialization failure (#2195)

* Bundled output for commit fd7cf8041e [skip ci]

* Fix #1714 conditionally halting stream (#2200)

* Fix #1714 conditionally halting stream

* Add note in changelog

* Do not include stream as named export in mithril.esm.js

* Rename mithril.min.esm.js to mithril.esm.min.js

* Add esm files to eslintignore

* Add named exports

* Add hyperscript `m` as named export

* Add builds with export changes

* checkout regular bundled files

* Change .esm.js to .mjs

* Update pkg module to point to .mjs

* Fix for export names to avoid collision

* Updated bundled files

ospec/package.json

@@ -3,6 +3,7 @@
   "version": "3.0.1",
   "description": "Noiseless testing framework",
   "main": "ospec.js",
+  "module": "ospec.mjs",
   "directories": {
     "test": "tests"
   },
@@ -12,6 +13,9 @@
   "bin": {
     "ospec": "./bin/ospec"
   },
+  "scripts": {
+    "prepublishOnly": "node esm.js"
+  },
   "repository": "MithrilJS/mithril.js",
   "dependencies": {
     "glob": "^7.1.2"