All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
* tokenizer should ignore spaces at the beginning of the argString ([#106](https://github.com/yargs/yargs-parser/issues/106)) ([f34ead9](https://github.com/yargs/yargs-parser/commit/f34ead9))
### Features
* make combining arrays a configurable option ([#111](https://github.com/yargs/yargs-parser/issues/111)) ([c8bf536](https://github.com/yargs/yargs-parser/commit/c8bf536))
* merge array from arguments with array from config ([#83](https://github.com/yargs/yargs-parser/issues/83)) ([806ddd6](https://github.com/yargs/yargs-parser/commit/806ddd6))
* Ignore multiple spaces between arguments. ([#100](https://github.com/yargs/yargs-parser/issues/100)) ([d137227](https://github.com/yargs/yargs-parser/commit/d137227))
### Features
* allow configuration of prefix for boolean negation ([#94](https://github.com/yargs/yargs-parser/issues/94)) ([00bde7d](https://github.com/yargs/yargs-parser/commit/00bde7d))
* reworking how numbers are parsed ([#104](https://github.com/yargs/yargs-parser/issues/104)) ([fba00eb](https://github.com/yargs/yargs-parser/commit/fba00eb))
### BREAKING CHANGES
* strings that fail `Number.isSafeInteger()` are no longer coerced into numbers.
* default '--' to undefined when not provided; this is closer to the array API ([#90](https://github.com/yargs/yargs-parser/issues/90)) ([4e739cc](https://github.com/yargs/yargs-parser/commit/4e739cc))
* environment variables should take precedence over config file ([#81](https://github.com/yargs/yargs-parser/issues/81)) ([76cee1f](https://github.com/yargs/yargs-parser/commit/76cee1f))
* parsing hints should apply for dot notation keys ([#86](https://github.com/yargs/yargs-parser/issues/86)) ([3e47d62](https://github.com/yargs/yargs-parser/commit/3e47d62))
### Chores
* upgrade to newest version of camelcase ([#87](https://github.com/yargs/yargs-parser/issues/87)) ([f1903aa](https://github.com/yargs/yargs-parser/commit/f1903aa))
### Features
* add -- option which allows arguments after the -- flag to be returned separated from positional arguments ([#84](https://github.com/yargs/yargs-parser/issues/84)) ([2572ca8](https://github.com/yargs/yargs-parser/commit/2572ca8))
* when parsing stops, we now populate "--" by default ([#88](https://github.com/yargs/yargs-parser/issues/88)) ([cd666db](https://github.com/yargs/yargs-parser/commit/cd666db))
### BREAKING CHANGES
* rather than placing arguments in "_", when parsing is stopped via "--"; we now populate an array called "--" by default.
* camelcase now requires Node 4+.
* environment variables will now override config files (args, env, config-file, config-object)
* environment variables should take precedence over config file ([#81](https://github.com/yargs/yargs-parser/issues/81)) ([76cee1f](https://github.com/yargs/yargs-parser/commit/76cee1f))
### BREAKING CHANGES
* environment variables will now override config files (args, env, config-file, config-object)
* inner objects in configs had their keys appended to top-level key when dot-notation was disabled ([#72](https://github.com/yargs/yargs-parser/issues/72)) ([0b1b5f9](https://github.com/yargs/yargs-parser/commit/0b1b5f9))
### Features
* allow multiple arrays to be provided, rather than always combining ([#71](https://github.com/yargs/yargs-parser/issues/71)) ([0f0fb2d](https://github.com/yargs/yargs-parser/commit/0f0fb2d))
* coerce should be applied to the final objects and arrays created ([#57](https://github.com/yargs/yargs-parser/issues/57)) ([4ca69da](https://github.com/yargs/yargs-parser/commit/4ca69da))
### BREAKING CHANGES
* coerce is no longer applied to individual arguments in an implicit array.
* coerce full array instead of each element ([#51](https://github.com/yargs/yargs-parser/issues/51)) ([cc4dc56](https://github.com/yargs/yargs-parser/commit/cc4dc56))
* parsing issue with numeric character in group of options ([#19](https://github.com/yargs/yargs-parser/issues/19)) ([f743236](https://github.com/yargs/yargs-parser/commit/f743236))
* **count:** do not increment a default value ([#39](https://github.com/yargs/yargs-parser/issues/39)) ([b04a189](https://github.com/yargs/yargs-parser/commit/b04a189))
* **boolean:** fix for boolean options with non boolean defaults (#20) ([2dbe86b](https://github.com/yargs/yargs-parser/commit/2dbe86b)), closes [(#20](https://github.com/(/issues/20)
* **package:** remove tests from tarball ([0353c0d](https://github.com/yargs/yargs-parser/commit/0353c0d))
* **parsing:** handle calling short option with an empty string as the next value. ([a867165](https://github.com/yargs/yargs-parser/commit/a867165))
* boolean flag when next value contains the strings 'true' or 'false'. ([69941a6](https://github.com/yargs/yargs-parser/commit/69941a6))
* update dependencies; add standard-version bin for next release (#24) ([822d9d5](https://github.com/yargs/yargs-parser/commit/822d9d5))
### Features
* **configuration:** Allow to pass configuration objects to yargs-parser ([0780900](https://github.com/yargs/yargs-parser/commit/0780900))
* **normalize:** allow normalize to work with arrays ([e0eaa1a](https://github.com/yargs/yargs-parser/commit/e0eaa1a))