Add changelog for v0.2.0

Closes #16

CHANGELOG.md

@@ -1,5 +1,36 @@
 # Changelog
 
+## v0.2.0
+
+- Fix `」` instead of Japanese full stop `。` being mapped to `.-.-..`
+- Fix `!` being encoded as `..--.` instead of `-.-.--`
+- Fix `Ð` being encoded to `..-.` instead of `..--.`
+- Add decoding of Latin extension based on Wikipedia article:
+    - `----` → `Ĥ`
+    - `...-.` → `Ŝ`
+    - `..--.` → `Ð`
+    - `.-..-` → `È`
+    - `.--..` → `Þ`
+    - `.---.` → `Ĵ`
+    - `--.-.` → `Ĝ`
+    - `...-...` → `Ś`
+    - `...--..` → `ß`
+- Add decoding of numbers (same as standard) and punctuation in Russian:
+    - `......` → `.`
+    - `.-.-.-` → `,`
+    - `---...` → `:`
+    - `-.-.-` → `;`
+    - `-.--.-` → `(`
+    - `.----.` → `'`
+    - `.-..-.` → `"`
+    - `-....-` → `—`
+    - `-..-.` → `/`
+    - `..--..` → `?`
+    - `--..--` → `!`
+    - `-...-` → `-`
+    - `.--.-.` → `@`
+- `encode_stream`, `encode_stream_ascii` and `decode_stream` now return `Result<(), std::io::Error>`
+
 ## v0.1.0
 
 - Encoding from Unicode to Morse code