Add changelog.

Author: goto-bus-stop

CHANGELOG.md

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+# tinyify change log
+
+All notable changes to this project will be documented in this file.
+
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## 2.4.3
+Remove direct dependency on uglify-es, use terser 3.7.6+.
+
+## 2.4.2
+Revert to using `uglify-es` pending release of https://github.com/fabiosantoscode/terser/commit/9255757bcabbd35a8f69a4966e6a4f59b1927d36
+
+## 2.4.1
+* Update [uglifyify](https://github.com/hughsk/uglifyify) to v5.
+  This aligns the `uglifyify` `--debug` flag handling with tinyify's. Chances of anything being broken before this patch are very small though.
+
+## 2.4.0
+* Add bundle-collapser when `--no-flat` is passed, to still save some bytes even if browser-pack-flat is not used.
+* Automatically disable bundle-collapser and browser-pack-flat when the `--full-paths` option is passed to Browserify
+
+## 2.3.0
+add API to easily apply tinyify to other browserify pipelines, like generated by factor-bundle or split-require.
+
+## 2.2.0
+add a `--no-flat` option for use with other tools that expect [browser-pack](https://github.com/browserify/browser-pack) output, such as [disc](https://github.com/hughsk/disc)
+
+## 2.1.1
+output ascii-only by default (https://github.com/goto-bus-stop/tinyify/commit/89aaf79bd70de9772e13f1a0644616e36368269a), see also choojs/bankai#277
+
+## 2.1.0
+Add `env` option for custom environment variables. (@yoshuawuyts in #2)
+
+## 2.0.0
+Update browser-pack-flat to v3.0.0. This fixes tinyify-ing entry points that assign exports, like what's common in choo apps:
+
+```js
+// app.js
+if (window) app.mount()
+else module.exports = app
+```
+
+The breaking change is that browser-pack-flat bundles will no longer assign `module.exports` when not using `--standalone`. This should not be a problem in 99.999% of cases, and is the same as what browser-pack does.