build(deps): update capnpc requirement from 0.14.2 to 0.16.5 in /gst-depth-meta-rs

Updates the requirements on capnpc to permit the latest version.

Commits

• 65c5b9c prepare for capnpc-v0.16.5 release
• 3b66078 std -> core in pointer_constants
• f820313 rename gen to ctx
• addd863 another get_qualified_module()
• 99f5d65 update comment on Zero trait
• 9d18311 simplify some format args
• 5a15026 more simplification enabled by GeneratorContext::node_parents
• 0b7a999 add comments about the source of write_message() errors
• f720c47 use GeneratorContext::get_qualified_module() more
• 3b19644 prepare for capnpc-v0.16.4 release
• Additional commits viewable in compare view