RE2 regex engine

Changes for 0.18 - 2023-06-19

• Fix on perl >= 5.38 (issue #15)
• Fix re->nparens signess warning (PR #13)

A helpful library for with CAPE.

Changes for 2.7.0 - 2023-06-18

• doc cleanup for suricata_extract_submit_extend
• mojo_cape_submit_extend doc update and now update app protos and max size

Filtering for Data::Sah

Changes for 0.018 - 2023-04-25

• Add perl filters: Str::ensure_trailing_newline, check_{lowercase,uppercase,oneline}.
• [doc] [perl filters ltrim,trim,rtrim] Show that tabs and newlines are also trimmed.
• [pod] In main modules' POD, list all the filter modules included in the distribution.