Trying with 3.9

.cirrus.yml

@@ -0,0 +1,21 @@
+task:
+  timeout_in: 120m
+  freebsd_instance:
+    matrix:
+      - image_family: freebsd-13-0-snap
+
+  env:
+    ASSUME_ALWAYS_YES: YES
+  setup_script:
+    - pkg update -f
+    - pkg install bash
+    - pkg install cmake
+    - pkg install git
+  build_script:
+    - mkdir build
+    - cd build
+    - cmake ..
+    - cmake --target unit
+  test_script:
+    - cd build
+    - ctest --output-on-failure 

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_policy(SET CMP0048 NEW)
 project(fast_double_parser LANGUAGES CXX VERSION 0.0.0.0)
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.9)
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 if (NOT CMAKE_BUILD_TYPE)