Version 2.1.1

• Fine-tune property and variable name whitelisting [#161]
• Enhancement: Add PHP 7.3 to Travis CI build matrix [#159]
• Prefix variables in global namespace [#157]
• Implement CS checking based on the WP_CLI_CS ruleset [#156]
• CS: clean up after merges [#155]
• Move PHP 5.4 tests from WP_VERSION latest to 5.1 [#152]
• Set Language header directly to prevent exceptions [#150]
• Fix make-pot tests [#135]
• Add script file name to JSON translation files [#134]
• Improve language handling when creating JSON files [#133]
• Add support for nested theme folders [#130]
• Prevent possible PHP notice in IterableCodeExtractor [#129]
• Extend PotGenerator to improve plural forms output [#128]
• Remove project header comments for comments audit [#123]
• PHPCS: fix up the code base [5] - multi-line function calls [#118]
• PHPCS: fix up the code base [4] - multi-line function calls [#116]
• PHPCS: fix up the code base [3] - no precision alignment [#115]
• PHPCS: fix up the code base [2] - yoda conditions [#114]
• PHPCS: fix up the code base [1] - whitespace [#113]