Update changelog and fix a typo

HISTORY.md

@@ -1,6 +1,6 @@
 # History
 
-## 0.4.0 (2021-05-TBD)
+## 0.4.0 (2021-05-12)
 * Add optional support for the following **request** headers:
     * `Cache-Control: max-age`
     * `Cache-Control: no-cache`
@@ -13,6 +13,7 @@
 * Add a `use_temp` option to `SQLiteBackend` to use a tempfile
 * Packaging is now handled with Poetry. For users, installation still works the same. For developers,
   see [Contributing Guide](https://aiohttp-client-cache.readthedocs.io/en/latest/contributing.html) for details
+* Published package on [conda-forge](https://anaconda.org/conda-forge/aiohttp-client-cache)
 
 ## 0.3.0 (2021-04-09)
 [See all issues & PRs for v0.3](https://github.com/JWCook/aiohttp-client-cache/milestone/2?closed=1)

README.md

@@ -29,7 +29,7 @@ Breaking changes should be expected until a `1.0` release, so version pinning is
 
 I am developing this while also maintaining [requests-cache](https://github.com/reclosedev/requests-cache),
 and my goal is to eventually have a similar (but not identical) feature set between the two libraries.
-If there is a feature you want, or if you've discovered a bug, of it you have other general feedback, please
+If there is a feature you want, if you've discovered a bug, or if you have other general feedback, please
 [create an issue](https://github.com/JWCook/aiohttp-client-cache/issues/new/choose) for it!
 
 # Quickstart

docs/user_guide.rst

@@ -8,6 +8,10 @@ Install with pip:
 
     $ pip install aiohttp-client-cache
 
+Or with conda, if you prefer:
+
+    $ conda install -c conda-forge aiohttp-client-cache
+
 Requirements
 ~~~~~~~~~~~~
 * Requires python 3.7+.