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