Typo in Travis config: s/ehco/echo

Author: ErichDonGubler

.travis.yml

@@ -23,7 +23,7 @@ matrix:
     - env: NAME='cargo-travis'
       sudo: required # travis-ci/travis-ci#9061
       before_script:
-        - cargo install cargo-update || ehco "cargo-update already installed"
+        - cargo install cargo-update || echo "cargo-update already installed"
         - cargo install cargo-travis || echo "cargo-travis already installed"
         - cargo install-update -a
       script: