switch to rust pre-release

using test-pypi

requirements.txt

@@ -1,7 +1,7 @@
-# Install clang-tools binaries (clang-format, clang-tidy)
-# For details please see: https://github.com/cpp-linter/clang-tools-pip
-clang-tools==0.13.1
 
 # cpp-linter core Python executable package
 # For details please see: https://github.com/cpp-linter/cpp-linter
-cpp-linter==1.10.4
+-i https://test.pypi.org/simple/ cpp-linter==2.0.0rc8
+# Install clang-tools binaries (clang-format, clang-tidy)
+# For details please see: https://github.com/cpp-linter/clang-tools-pip
+-i https://pypi.org/simple clang-tools==0.13.1