fix: Update for new Rust release

epage · epage · commit cc6f3a1f82fd · 2018-02-15T15:21:52.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 sudo: false
 language: rust
 rust:
-- 1.21.0  # Two releases back
+- 1.22.0  # Two releases back
 - stable
 - beta
 - nightly
