Revert "Pin Travis to nightly-2019-09-10"

dtolnay · dtolnay · commit 9195ced29f75 · 2019-09-24T19:08:59.000-07:00
The bug motivating us to pin has been fixed in nightly. This reverts commit 2d610bf.
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,7 @@ language: rust
 
 matrix:
   include:
-    - rust: nightly-2019-09-10
+    - rust: nightly
       script: cargo test
       env: RUSTFLAGS='--cfg async_trait_nightly_testing'
     - rust: stable
