Conan version in requirements is outdated, makes pipeline fail

Summary

The requirements.txt has conan 1.43, which is missing the is_msvc function, which makes the pipelines fail.

Expected Behavior

Pipelines should run.

Actual Behavior

Pipeline fails with:

zlib/1.2.12: Downloaded recipe revision 0
ERROR: zlib/1.2.12: Cannot load recipe.
Error loading conanfile at '/root/.conan/data/zlib/1.2.12/_/_/export/conanfile.py': Unable to load conanfile in /root/.conan/data/zlib/1.2.12/_/_/export/conanfile.py
  File "/usr/lib/python3.9/imp.py", line 171, in load_source
    module = _load(spec)
  File "<frozen importlib._bootstrap>", line 711, in _load
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/root/.conan/data/zlib/1.2.12/_/_/export/conanfile.py", line 1, in <module>
    from conan.tools.microsoft import is_msvc
ImportError: cannot import name 'is_msvc' from 'conan.tools.microsoft' (/usr/local/lib/python3.9/dist-packages/conan/tools/microsoft/__init__.py)
The command '/bin/sh -c conan create .. -s "compiler.libcxx=libstdc++11"' returned a non-zero code: 1
ERROR: Job failed: exit code 1

Steps to Reproduce the Problem

Run pipeline in Gitlab.

Specifications

Version: Latest dev
Platform: Linux

Possible fixes

Upgrade requirements.txt