README.md: No longer advertise this as Python 2 compatible

Also, clean up formatting somewhat and remove old commentary

README.md

@@ -1,23 +1,29 @@
 ChatExchange
 ============
 
-[![Github Actions build status for master](https://github.com/Manishearth/ChatExchange/actions/workflows/lint+test.yml/badge.svg)](https://github.com/Manishearth/ChatExchange/actions)
+[![Github Actions build status for master][1]][2]
 
-A Python2 and Python3 cross-version API for talking to Stack Exchange chat.
+  [1]: https://github.com/Manishearth/ChatExchange/actions/workflows/lint+test.yml/badge.svg
+  [2]: https://github.com/Manishearth/ChatExchange/actions
 
- - Supported Python versions (Travis CI build run for each of these):  
-    `2.7`, `3.4`, `3.5`, `3.6`, `3.7-dev`, `nightly` 
- - Unclear versions (not run on Travis CI as `pytest` does not support them):
-    `2.6`, `3.2`, `3.3`
+A Python3 API for talking to Stack Exchange chat.
+
+ - Supported Python versions (tests run by Github Actions):
+   3.7, 3.8, 3.9, 3.10, 3.11, 3.12
+ - Unclear versions (not run on Github Actions
+   as Github no longer supports them):
+   2.7 (sic), 3.4, 3.5, 3.6
 
 ## Dependencies
-**Make sure you use either `pip2` or `pip3` depending on which Python version you want to run this on.**
 
+`pip install chatexchange` pulls in the following libraries:
 
  - BeautifulSoup (`pip install beautifulsoup4`)
- - Requests (`pip install requests`). Usually there by default. Please upgrade it with `pip install requests --upgrade`  
-   *Note that Ubuntu comes with an old version of `pip` that is not compatible any more with the latest version of `requests`. It will be broken after you installed `requests`, except if you update it before (or afterwards) with `easy_install pip` or `pip install --upgrade pip` (that one works only before).*
- - python-websockets for the experimental websocket listener (`pip install websocket-client`). This module is optional, without it `initSocket()` from SEChatBrowser will not work
+ - Requests (`pip install requests`)
+ - python-websockets for the experimental websocket listener
+   (`pip install websocket-client`).
+   This module is optional; without it, `initSocket()` from SEChatBrowser
+   will not work.
 
 The package has a number of additional development requirements;
 install them with
@@ -28,7 +34,9 @@ or `.[dev]` if you are in the top directory of a local copy of the source.
 
 ## Shortcuts
 
-1. `make install-dependencies` will install the necessary Python package dependencies into your current environment (active virtualenv or system site packages)
+1. `make install-dependencies` will install the necessary
+   Python package dependencies into your current environment
+   (active virtualenv or system site packages)
 2. `make test` will run the tests
 3. `make run-example` will run the example script
 4. `make` will run the above three in order
@@ -37,13 +45,16 @@ or `.[dev]` if you are in the top directory of a local copy of the source.
 
 Licensed under either of
 
- * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
- * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE)
+   or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT)
+   or http://opensource.org/licenses/MIT)
 
 at your option.
 
 ### Contribution
 
-Unless you explicitly state otherwise, any contribution intentionally submitted
-for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
-additional terms or conditions.
+Unless you explicitly state otherwise, any contribution
+intentionally submitted for inclusion in the work by you,
+as defined in the Apache-2.0 license, shall be dual licensed as above,
+without any additional terms or conditions.