Merge pull request #85 from michaelwoerister/require-building-on-nightly-and-beta

Make sure all crates compile on nightly and beta.

Author: wesleywiser

.travis.yml

@@ -1,3 +1,5 @@
 language: rust
 rust:
   - stable
+  - beta
+  - nightly

measureme/src/serialization.rs

@@ -60,7 +60,7 @@ impl SerializationSink for ByteVecSink {
 }
 
 impl std::fmt::Debug for ByteVecSink {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "ByteVecSink")
     }
 }