Update changelog and noxfile

Author: aleneum

Changelog.md

@@ -4,6 +4,10 @@
 
 - Bug #594: Fix may_<trigger> always returning false for internal transitions (thanks @a-schade)
 - PR #592: Pass investigated transition to `EventData` context in 'may' check (thanks @msclock)
+- PR #634: Improve the handling of diagrams when working with parallel states, especially when using the show_roi option (thanks @seanxlliu)
+- '_anchor' suffix has been removed for (py)graphviz cluster node anchors
+- local testing switched from [tox](https://github.com/tox-dev/tox) to [nox](https://github.com/wntrblm/nox)
+- PR #633: Remove surrounding whitespace from docstrings (thanks @artofhuman)
 
 ## 0.9.0 (September 2022)
 

noxfile.py

@@ -1,23 +1,28 @@
 import nox
 
+
 python = ["2.7", "3.7", "3.8", "3.9", "3.10", "3.11"]
 nox.options.stop_on_first_error = True
 
+
 @nox.session(
     python=python[-1]
 )
 def test_check_manifest(session):
     session.install("check-manifest")
     session.run("check-manifest")
 
+
 @nox.session(
     python=python[-1]
 )
 def test_mypy(session):
     session.install(".")
-    session.install("-rrequirements_mypy.txt")
+    session.install("-rrequirements_test.txt")
     session.install("-rrequirements_diagrams.txt")
-    session.run("mypy", "transitions")
+    session.install("-rrequirements_mypy.txt")
+    session.run("pytest", "-nauto", "--doctest-modules", "tests/")
+
 
 @nox.session(
     python=python
@@ -28,6 +33,7 @@ def test(session):
     session.install("-rrequirements_diagrams.txt")
     session.run("pytest", "-nauto", "tests/")
 
+
 @nox.session(
     python=python[-1]
 )