Fix for LoadError - cannot load such file -- nanaimo (#362)

* Update .travis.yml
diff --git a/.travis.yml b/.travis.yml
index 3bbc41e..798d654 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -63,7 +63,6 @@
   - rvm use 2.2.5
   - gem update --system
   - gem install xcpretty --no-rdoc --no-ri --no-document --quiet
-  - gem install xcodeproj:1.4.1
 before_script:
   - Scripts/setup-earlgrey.sh
 script:
diff --git a/Scripts/travis.sh b/Scripts/travis.sh
index cf8f3cd..e2326ff 100755
--- a/Scripts/travis.sh
+++ b/Scripts/travis.sh
@@ -104,6 +104,7 @@
   pod install --project-directory=Demo/EarlGreyExample
   execute_xcodebuild Demo/EarlGreyExample/EarlGreyExample.xcworkspace EarlGreyExampleTests
 elif [ "${TYPE}" == "EXAMPLE_PODS_SWIFT" ]; then
+  gem uninstall -aIx nanaimo
   cd gem/
   bundle install
   rake install