trim some old versions

jhongturney · jhongturney · commit 06beb5518789 · 2024-06-12T13:16:02.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,4 @@ script: "script/cibuild"
 matrix:
   include:
     - rvm: 2.7
-    - rvm: 2.4
-    - rvm: 2.3.2
-    - rvm: 2.2.3
-    - rvm: 2.1
+    - rvm: 2.5
