[2020][ruby] set ruby version to 3
change kxkwnvmlxxnowvrxkowynxoqvuymonuo
commit ba4b7c923d36385dbc2ab4d006e1ece8dcd7ccad
author Alpha Chen <alpha@kejadlen.dev>
date
parent vmxlurkv 
diff --git a/2020/ruby/.ruby-version b/2020/ruby/.ruby-version
new file mode 100644
index 0000000..00750ed
--- /dev/null
+++ b/2020/ruby/.ruby-version
@@ -0,0 +1 @@
+3