Do not complain about barewords from Types::Serialiser
Running the CodePolicy on the current rel-11_0 branch gave a violation for Kernel/System/JSON.pm .
[33mTidyAll::Plugin::OTOBO::Perl::SyntaxCheck[0m [31mBareword "Types::Serialiser::true" not allowed while "strict subs" in use at /tmp/v4Auovn2Sy line 226. /tmp/v4Auovn2Sy had compilation errors.[0m
The code in Kernel/System/JSON.pm looks sane. So let's avoid the warning by keeping use Types::Serialiser;
in the checked code.