ci: pin psych to v4 until v5 builds properly on CI

flavorjones · flavorjones · commit 47a835afbfff · 2022-12-11T12:47:24.000-05:00
diff --git a/Gemfile b/Gemfile
@@ -1,2 +1,3 @@
 source "https://rubygems.org/"
 gemspec
+gem "psych", "~> 4.0"
