build(deps): update capnpc requirement from 0.14.2 to 0.16.1 in /gst-depth-meta-rs

Updates the requirements on capnpc to permit the latest version.

Commits

• 5f8683f prepare for capnpc-v0.16.1 release
• 90f6b74 Merge pull request #368 from danieleades/macro-braces
• 3342c43 regenerate code
• 289bb97 Merge pull request #369 from zh-jq/master
• 135332d fix clippy warning
• 69b8331 use standard macro braces
• 93df012 update version in comment
• 8e2c999 prepare for 0.16.0 release
• a235fb3 cargo fmt
• 0bfb8d7 remove FromStructReader and FromStructBuilder in favor of core::convert::From
• Additional commits viewable in compare view