Add required path option to conan create

conan 1.0 sets this arg as mandatory for the create command. This should
fix your CI build.

.travis.yml

@@ -80,7 +80,7 @@ script:
 
   # Run conan package test (only on linux, pip is not available in the osx build)
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then conan remote add Manu343726 https://api.bintray.com/conan/manu343726/conan-packages; fi
-  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then cd .. && conan create Manu343726/testing --build=outdated && cd build; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then cd .. && conan create . Manu343726/testing --build=outdated && cd build; fi
 
 after_success:
   - git config --global user.name "Travis CI"