Update travis to use minimum rustc version 1.22.0 required by secp256k1 0.13

jonasnick · jonasnick · commit fe8335a1172b · 2019-06-26T22:19:33.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -3,5 +3,5 @@ rust:
   - stable
   - beta
   - nightly
-  - 1.14.0
+  - 1.22.0
 

-Original file line number
+Diff line change
   - stable
   - beta
   - nightly
 -  - 1.14.0
 +  - 1.22.0