add changelog and bump version

CHANGELOG.md

@@ -0,0 +1,5 @@
+# 0.1.1
+
+_26 February 2022_
+
+ - [PR #32](https://git.coopcloud.tech/golgi-ssb/golgi/pulls/32): Fix two filter-related bugs which resulted in `get_about_message_stream(ssb_id)` returning **all** messages authored by `ssb_id`.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "golgi"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 authors = ["Max Fowler <max@mfowler.info>", "Andrew Reid <glyph@mycelial.technology>"]
 readme = "README.md"