Server Release 0.906 / Client Release v0.0.18

• A typo in the deprecation message for the perl.perltidyrc setting is fixed - thank you @yanick!
• Documentation for using PLS with emacs was added - thank you @c-alpha!
• The .perltidyrc and .perlcriticrc can now be specified as a path relative to the project.
  • ${workspaceFolder} is now recommended over $ROOT_PATH to be consistent with other VSCode configuration.
• The perl binary path can now be specified with a glob (for example, your home directory can be specified with "~")
• The @INC provided by the pls.inc setting is no longer sorted alphanumerically.
• IO::Async::Process is used instead of open/open3, which should prevent pls hangs due to blocking I/O.
• Hover and go to definition no longer parse the entire document, which is a dramatic performance improvement for large files.
• The vscode-languageclient package in the VSCode extension was upgraded to 9.0.1.