Explicit Browser Support (#1682)

* add FastestSmallestTextEncoderDecoder polyfill

* remove nomodule from script import

* add browserslist

* add obsolete-webpack-plugin

* switch out modern-browser for preset-env

* add prompt on non target browser

* propagate prod changes to dev

* add core-js-3 and TextEncoder TextDecoder (#1671)

* add script to remove react, style html

* propagate changes to prod

* add script-ext-html-webpack-plugin for async

* more styling

* add eslint-plugin-compat

* extend compat plugin

* add existing polyfills

* add github fetch polyfill

* add AbortController polyfill

* change promptOnNonTargetBrowser to false

* propagate

* add browser links

* prettier

* add browser support to readme

* move polyfills to webpack

* remove CDN encoder polyfill

* Add no Explorer support

* fix incorrect package name

* propagate changes

* Update README.md

Co-authored-by: Ambrose J Carr <ambrosejcarr@users.noreply.github.com>

* add new deps

* create shared config

* swap out html-loader for filestream

* sanitize template

Co-authored-by: Timmy Huang <tihuan@users.noreply.github.com>
Co-authored-by: Ambrose J Carr <ambrosejcarr@users.noreply.github.com>

README.md

@@ -14,26 +14,30 @@ Whether you need to visualize one thousand cells or one million, cellxgene helps
 <img src="https://github.com/chanzuckerberg/cellxgene/raw/main/docs/images/crossfilter.gif" width="350" height="200" hspace="30"><img src="https://github.com/chanzuckerberg/cellxgene/raw/main/docs/images/category-breakdown.gif" width="350" height="200" hspace="30">
 
 # Getting started
+
 ### The comprehensive guide to cellxgene
+
 [The cellxgene documentation is your one-stop-shop for information about cellxgene](https://chanzuckerberg.github.io/cellxgene/)! You may be particularly interested in:
-* Seeing [what cellxgene can do](https://chanzuckerberg.github.io/cellxgene/posts/gallery)  
-* Learning more about cellxgene [installation](https://chanzuckerberg.github.io/cellxgene/posts/install) and [usage](https://chanzuckerberg.github.io/cellxgene/posts/launch)
-* [Preparing your own data](https://chanzuckerberg.github.io/cellxgene/posts/prepare) for use in cellxgene
-* Checking out [our roadmap](https://chanzuckerberg.github.io/cellxgene/posts/roadmap) for future development
-* [Contributing](https://chanzuckerberg.github.io/cellxgene/posts/contribute) to cellxgene
+
+- Seeing [what cellxgene can do](https://chanzuckerberg.github.io/cellxgene/posts/gallery)
+- Learning more about cellxgene [installation](https://chanzuckerberg.github.io/cellxgene/posts/install) and [usage](https://chanzuckerberg.github.io/cellxgene/posts/launch)
+- [Preparing your own data](https://chanzuckerberg.github.io/cellxgene/posts/prepare) for use in cellxgene
+- Checking out [our roadmap](https://chanzuckerberg.github.io/cellxgene/posts/roadmap) for future development
+- [Contributing](https://chanzuckerberg.github.io/cellxgene/posts/contribute) to cellxgene
 
 ### Quick start
 
 To install cellxgene you need Python 3.6+. We recommend [installing cellxgene into a conda or virtual environment.](https://chanzuckerberg.github.io/cellxgene/posts/install)
 
 Install the package.
-``` bash
+
+```bash
 pip install cellxgene
 ```
 
 Launch cellxgene with an example [anndata](https://anndata.readthedocs.io/en/latest/) file
 
-``` bash
+```bash
 cellxgene launch https://cellxgene-example-data.czi.technology/pbmc3k.h5ad
 ```
 
@@ -41,6 +45,17 @@ To explore more datasets already formatted for cellxgene, check out the [Demo da
 see [Preparing your data](https://chanzuckerberg.github.io/cellxgene/posts/prepare) to learn more about formatting your own
 data for cellxgene.
 
+### Supported browsers
+
+cellxgene currently supports the following browsers:
+
+- Google Chrome 61+
+- Edge 15+
+- Firefox 60+
+- Safari 10.1+
+
+Please [file an issue](https://github.com/chanzuckerberg/cellxgene/issues/new/choose) if you would like us to add support for an unsupported browser.
+
 ### Finding help
 
 We'd love to hear from you!
@@ -51,6 +66,7 @@ For any errors, [report bugs on Github](https://github.com/chanzuckerberg/cellxg
 # Developing with cellxgene
 
 ### Contributing
+
 We warmly welcome contributions from the community! Please see our [contributing guide](https://chanzuckerberg.github.io/cellxgene/posts/contribute) and don't hesitate to open an issue or send a pull request to improve cellxgene.
 
 This project adheres to the Contributor Covenant [code of conduct](https://github.com/chanzuckerberg/.github/blob/master/CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code. Please report unacceptable behavior to opensource@chanzuckerberg.com.
@@ -64,6 +80,7 @@ This project was started with the sole goal of empowering the scientific communi
 If you believe you have found a security issue, we would appreciate notification. Please send email to <security@chanzuckerberg.com>.
 
 # About
+
 ### Core team
 
 The current core team: