Tweaking cargo-travis installation

.travis.yml

@@ -29,7 +29,7 @@ matrix:
 
 # This is a pretty big hack and only really needed on the first of a build chain
 before_script:
-  - (cargo install cargo-travis | true) && export PATH=$HOME/.cargo/bin:$PATH
+  - cargo install cargo-travis -f && export PATH=$HOME/.cargo/bin:$PATH
 
 # Build, test, benchmark, document. Gogogogo!
 script:
@@ -45,4 +45,4 @@ after_success:
 notifications:
   email:
     on_success: never
-on_failure: never
\ No newline at end of file
+    on_failure: never