Release pegen 0.3.0 // Update release notes

Author: lysnikolaou

releasenotes.rst

@@ -1,7 +1,17 @@
 Release notes
 ==============
 
-unreleased: Version 0.2.0
+2023-11-14: Version 0.3.0
+-------------------------
+
+- Replace nullable_visit with NullableVisitor (#86)
+- Implement nullable detection via NullableVisitor (#91)
+- Support Python 3.11 and 3.12 (#95)
+- Support Python 3.12 f-strings in grammar actions (#94, #96)
+- Fix typing in parser class and minor f-string fix (#97)
+- Improve CI/CD workflows (#98)
+
+2023-01-18: Version 0.2.0
 -------------------------
 
 - add delayed error inspection, invalid rules pass and recursive detection of
@@ -13,7 +23,7 @@ unreleased: Version 0.2.0
 - update grammar_grapher with the new forced (&&) directive PR #57
 - fixed bug where tokenizer reported the last line of source as empty #77
 
-09/06/2021: Version 0.1.0
+2021-09-06: Version 0.1.0
 -------------------------
 
 First numbered release