requirements: bump sigstore

woodruffw · woodruffw · commit e86b5a6b8962 · 2022-09-15T16:03:10.000-04:00
This will fix #25 once it's in a release. Signed-off-by: William Woodruff <william@trailofbits.com>
diff --git a/requirements.txt b/requirements.txt
@@ -1 +1 @@
-sigstore==0.6.3
+sigstore==0.6.4
