py-cpplint: updated to 1.6.1

1.6.1 (2022-08-20)

Fix 195 Fix post increment/decrement operator causing a false positive.
Fix 202 .hh files should not be considered sytem headers
Fix 207 Python2 incompatibility for loading CPPLINT.cfg file
Fix 184 NOLINT(clang-analyzer) comments should not cause warnings

1.6.0 (2022-02-19)

Fix 188: "Include the directory when naming header files" also for header files with other names like "*.hpp"

(adam)