Raise minimum version of typed-ast to make it work with newer Python versions.

twistedpeer · twistedpeer · commit 7a150fe99814 · 2024-02-02T18:27:36.000+01:00
Note: See sifive#574 for details.
diff --git a/requirements.txt b/requirements.txt
@@ -2,7 +2,7 @@ mypy==0.750
 mypy-extensions==0.4.3
 pydevicetree==0.0.12
 pyparsing==2.4.5
-typed-ast==1.4.0
+typed-ast>=1.4.1
 typing-extensions==3.7.4.1
 Jinja2==2.11.3
 MarkupSafe==1.1.1
