fix(Travis): Make travis run saucelabs tests

After 2bdd734 it looks like the serialsauce task isn't getting run on
travis, so we haven't been doing any cross-browser testing for a month...

Hopefully this change will do the right if-checks in bash and let the
trask run.

lib/sauce/sauce_connect_block.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if [ ! $TRAVIS_PULL_REQUEST ]
+if [ ! $TRAVIS_PULL_REQUEST == "true" ]
 then
   # Wait for Connect to be ready before exiting
   while [ ! -f $SAUCE_CONNECT_READY_FILE ]; do

lib/sauce/sauce_connect_setup.sh

@@ -13,7 +13,7 @@ set -e
 #   - curl https://gist.github.com/santiycr/5139565/raw/sauce_connect_setup.sh | bash
 
 # Skip this if we're un a pull request, we won't be able to connect
-if [ $TRAVIS_PULL_REQUEST ]
+if [ $TRAVIS_PULL_REQUEST == "true" ]
 then
   exit 0
 fi

travis_build.sh

@@ -20,7 +20,7 @@ grunt
 
 # If this is a pull request then we won't have access to secure variables and can't do integration tests with SauceLabs.
 #   In this case just do normal local tests
-if [ $TRAVIS_PULL_REQUEST ]
+if [ $TRAVIS_PULL_REQUEST == "true" ]
 then
   grunt test
 else