Set the minimum required CMake version to 3.11

* Make travis-ci install a recent CMake version
* Update function2

.travis.yml

@@ -17,8 +17,6 @@ matrix:
           packages:
             - g++-6
             - valgrind
-            - cmake
-            - cmake-data
             - ninja-build
       env:
         - COMPILER=g++-6
@@ -35,8 +33,6 @@ matrix:
             - llvm-toolchain-trusty-5.0
           packages:
             - clang-5.0
-            - cmake
-            - cmake-data
             - ninja-build
       env:
         - COMPILER=clang++-5.0
@@ -53,8 +49,6 @@ matrix:
             - llvm-toolchain-trusty-5.0
           packages:
             - clang-5.0
-            - cmake
-            - cmake-data
             - ninja-build
       env:
         - COMPILER=clang++-5.0

CMakeLists.txt

@@ -19,7 +19,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-cmake_minimum_required(VERSION 3.2)
+cmake_minimum_required(VERSION 3.11)
 project(continuable VERSION 3.0.0 LANGUAGES C CXX)
 
 if (NOT CTI_CONTINUABLE_IS_FIND_INCLUDED)

dep/function2/function2

@@ -1 +1 @@
-Subproject commit 5d227e6d5abd67bb618bed8b6221574b93a52248
+Subproject commit 5112fc3e8ca3042ebd37fbafbe69ee4cadb8b075

tools/travis-ci.sh

@@ -1,4 +1,15 @@
 #!/bin/bash -e
+# Install some dependencies manually
+DEPS_DIR="${HOME}/deps"
+mkdir -p ${DEPS_DIR}
+cd ${DEPS_DIR}
+
+# Recent CMake:
+CMAKE_URL="https://cmake.org/files/v3.11/cmake-3.11.4-Linux-x86_64.tar.gz"
+mkdir cmake && wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
+export PATH=${DEPS_DIR}/cmake/bin:${PATH}
+cmake --version
+
 ############################################################################
 # Install libc++ and libc++abi if needed
 # Taken from here: https://github.com/boostorg/hana/blob/master/.travis.yml