[netlify] Use included yarn and ruby versions so builds are faster

jeanregisser · jeanregisser · commit 411ca4c90a2c · 2019-05-22T20:36:04.000+02:00
diff --git a/netlify.toml b/netlify.toml
@@ -1,2 +1,5 @@
 [build.environment]
   NODE_VERSION = "10.15.3"
+  YARN_VERSION = "1.13.0"
+  RUBY_VERSION = "2.6.2"
+
