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I've done some overdue work on refactoring the core engine - pulling out the dependency on go-yaml. There are a couple of slight output changes (whitespace / document separators) in some niche scenarios - I think they are improvements, Bit nervous on releasing this, but all the tests are passing and I've added more tests! Love some early feedback :)

• Added tonumber support
• Added kind operator
• Lua output fixes (#1811) - Thanks @Zash!
• Add support for Lua input (#1810) - Thanks @Zash!
• Bumped dependencies

• Fix various typos #1798
• Fixed number parsing as float bug in JSON #1756
• Fixed string, null concatenation consistency #1712
• Fixed expression parsing issue #1711
• Bumped dependencies

• Added Lua output support (Thanks @Zash)!
• Added BSD checksum format (Thanks @viq)!
• Bumped dependencies

Bumped depedencies

• Added shell output format thanks @giorgiga
• Fixed nil pointer dereference (#1649) thanks @ArthurFritz
• Bumped dependency versions

• Fixed bug when splatting empty array #1613
• Added scalar output for TOML (#1617)
• Fixed passing of read-only context in pipe (partial fix for #1631)
• Bumped dependency versions

• Add --nul-output|-0 flag to separate element with NUL character (#1550) Thanks @vaab!
• Add removable-media interface plug declaration to the snap packaging(#1618) Thanks @brlin-tw!
• Scalar output now handled in csv, tsv and property files
• Bumped dependency versions

• Added read-only TOML support! #1364. Thanks @pelletier for making your API available in your toml lib :)
• Added warning when auto detect by file type is outputs JSON (#1608)

Fixes parsing terraform tfstate files results in "unknown" format

• Added divide and modulo operators (#1593) - thanks @teejaded!
• Add support for decoding base64 strings without padding (#1555) - thanks @teejaded!
• Add filter operation (#1588) - thanks @rbren!
• Detect input format based on file name extension (#1582) - thanks @ryenus!
• Auto output format when input format is automatically detected
• Fixed npe in log #1596
• Improved binary file size!
• Bumped dependency versions