Test in Rust 1.20.0 on Travis

mbrubeck · mbrubeck · commit 76fc41f904ee · 2018-08-07T11:29:25.000-07:00
This will ensure we don't increase the minimum supported Rust version
without noticing it.
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,6 @@
 language: rust
 rust:
+  - 1.20.0
   - nightly
   - beta
   - stable

-Original file line number
+Diff line change
@@ @@ -1,5 +1,6 @@ @@
 language: rust
 rust:
 +  - 1.20.0
   - nightly
   - beta
   - stable