Update CMake from 3.3 to 3.5 on Travis

.travis.yml

@@ -130,7 +130,7 @@ install:
   - mkdir -p ${DEPS_DIR} && cd ${DEPS_DIR}
   - |
     if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
-      CMAKE_URL="http://www.cmake.org/files/v3.3/cmake-3.3.2-Linux-x86_64.tar.gz"
+      CMAKE_URL="http://www.cmake.org/files/v3.5/cmake-3.5.1-Linux-x86_64.tar.gz"
       mkdir cmake && travis_retry wget --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
       export PATH=${DEPS_DIR}/cmake/bin:${PATH}