Move travis fuzzing to 1.34.2 to get integer atomics

Author: TheBlueMatt

.travis.yml

@@ -3,7 +3,7 @@ rust:
   - stable
   - beta
   - 1.22.0
-  - 1.29.2
+  - 1.34.2
 cache: cargo
 
 before_install:
@@ -13,5 +13,5 @@ before_install:
 script:
   - cargo build --verbose
   - cargo test --verbose
-  - if [ "$(rustup show | grep default | grep 1.29.2)" != "" ]; then cd fuzz && cargo test --verbose && ./travis-fuzz.sh; fi
+  - if [ "$(rustup show | grep default | grep 1.34.2)" != "" ]; then cd fuzz && cargo test --verbose && ./travis-fuzz.sh; fi
   - if [ "$(rustup show | grep default | grep stable)" != "" ]; then cd net-tokio && cargo build --verbose; fi