Cover 0.2.0 in the release notes (#17)

Author: Gallaecio

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
-### 0.1.0 (2022-06-21)
+## 0.2.0 (to be released)
+
+Dropped Python 3.6 support, added official Python 3.10, 3.11 and PyPy support.
+
+A specified content type is no longer ignored for being a variant of
+`plain/text`, unless it is one of the 4 specific variants affected by the old
+Apache bug [13986](https://bz.apache.org/bugzilla/show_bug.cgi?id=13986).
+
+## 0.1.0 (2022-06-21)
 
 Initial release.