BUILD: Update cffi requirement from <1.17,>=1.16.0 to >=1.16.0,<1.18 (#718)

Updates the requirements on [cffi](https://github.com/python-cffi/cffi) to permit the latest version.
- [Release notes](https://github.com/python-cffi/cffi/releases)
- [Commits](python-cffi/cffi@v1.16.0...v1.17.0)

---
updated-dependencies:
- dependency-name: cffi
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sébastien Morais <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -25,7 +25,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "cffi>=1.16.0,<1.17; platform_system=='Linux'",
+    "cffi>=1.16.0,<1.18; platform_system=='Linux'",
     "pywin32 >= 303;platform_system=='Windows'",
     "ansys-pythonnet >= 3.1.0rc3",
     "dotnetcore2 ==3.1.23;platform_system=='Linux'",