chore: release 16.1.0

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🤖 I have created a release *beep* *boop*

16.1.0 (2020-06-26)

⚠ BREAKING CHANGES

• drops Node 6. begin following Node.js LTS schedule (build!: drops Node 6. begin following Node.js LTS schedule yargs/yargs-parser#278)
• the narg count is now enforced when parsing arrays.
• this reverts parsing behavior of booleans to that of yargs@14
• objects used during parsing are now created with a null
• populate error if incompatible narg/count or array/count options are used (feat!: populate error if incompatible narg/count or array/count options are used yargs/yargs-parser#191)
• moving to c8 for coverage and dropping Node 6 from build matrix (build!: moving to c8 for coverage and dropping Node 6 from build matrix yargs/yargs-parser#209)
• rework collect-unknown-options into unknown-options-as-args, providing more comprehensive functionality
• unless "parse-numbers" is set to "false", arrays of numeric strings are now parsed as numbers, rather than strings.
• we have dropped the broken "defaulted" functionality; we would like to revisit adding this in the future.
• maybeCoerceNumber now takes precedence over coerce return value (Coerce function returns option of type "number" as "string" yargs/yargs-parser#182)
• options with leading '+' or '0' now parse as strings
• a flag with no right-hand value no longer populates defaulted options with undefined.
• quotes and beginning and endings of strings are not removed during parsing.
• drops Node 4 support
• the argv object is now populated differently (correctly) when hyphens and dot notation are used in conjunction.
• boolean flags defined without a default value will now behave like other option type and won't be set in the parsed results when the user doesn't set the corresponding CLI arg.
• arguments of form --foo, -abc, will no longer be consumed by nargs
• strings that fail Number.isSafeInteger() are no longer coerced into numbers.

Features

• deps: update to latest camelcase/decamelize (#281) (8931ab0)
• add set-placeholder-key configuration (#123) (19386ee)
• add strip-aliased and strip-dashed configuration options. (#172) (a3936aa)
• add configuration option to "collect-unknown-options" (#181) (7909cc4)
• add halt-at-non-option configuration option (#130) (a849fce)
• allow configuration of prefix for boolean negation (#94) (00bde7d)
• also add camelCase array options (#125) (08c0117)
• array.type can now be provided, supporting coercion (#132) (4b8cfce)
• boolean arguments will not be collected into an implicit array (#236) (34c4e19)
• default value is now used if no right-hand value provided for numbers/strings (#156) (5a7c46a)
• don't coerce number from string with leading '0' or '+' (#158) (18d0fd5)
• introduce greedy-arrays config, for specifying whether arrays consume multiple positionals (#249) (60e880a)
• introduce nargs-eats-options config option (#246) (d50822a)
• introduce single-digit boolean aliases (#255) (9c60265)
• make combining arrays a configurable option (#111) (c8bf536)
• maybeCoerceNumber() now takes into account arrays (#187) (31c204b)
• merge array from arguments with array from config (#83) (806ddd6)
• NaN can now be provided as a value for nargs, indicating "at least" one value is expected for array (#251) (9db4be8)
• narg arguments no longer consume flag arguments (#114) (60bb9b3)
• options that have had their default value used are now tracked (#211) (a525234)
• populate error if incompatible narg/count or array/count options are used (#191) (84a401f)
• rework collect-unknown-options into unknown-options-as-args, providing more comprehensive functionality (ef771ca)
• reworking how numbers are parsed (#104) (fba00eb)
• support boolean which do not consume next argument. (#171) (0ae7fcb)

Bug Fixes

• array, nargs: support -o=--value and --option=--value format (#262) (41d3f81)
• deps: update dependency decamelize to v3 (#274) (4d98698)
• setArg: options using camel-case and dot-notation populated twice (#268) (f7e15b9)
• proto will now be replaced with proto in parse (#258) (63810ca)
• address bugs with "uknown-options-as-args" (bc023e3)
• address issue with array options with array default values (#206) (f5f9e5a)
• allow null config values (#108) (d8b14f9)
• array should take precedence over nargs, but enforce nargs (#243) (4cbc188)
• better handling of quoted strings (#153) (2fb71b2)
• boolean arrays with default values (#185) (7d42572)
• boolean now behaves the same as other array types (#184) (17ca3bd)
• convert values to strings when tokenizing (#167) (57b7883)
• do not set boolean flags if not defined in argv (#119) (f6e6599)
• eatNargs() for 'opt.narg === 0' and boolean typed options (#188) (c5a1db0)
• ensure consistent parsing of dot-notation arguments (#102) (c9bd79c)
• ensure empty string is added into argv._ (#140) (79cda98)
• flatten-duplicate-arrays:false for more than 2 arrays (#128) (2bc395f)
• handling of one char alias (#139) (ee56e31)
• hyphenated flags combined with dot notation broke parsing (#131) (dc788da)
• Ignore multiple spaces between arguments. (#100) (d137227)
• implement @antoniom's fix for camel-case expansion (3087e1d)
• make requiresArg work in conjunction with arrays (#136) (77ae1d4)
• maybeCoerceNumber now takes precedence over coerce return value (#182) (2f26436)
• nargs should allow duplicates when duplicate-arguments-array=false (#164) (47ccb0b)
• nargs was consuming too many arguments (4fef206)
• nargs was still aggressively consuming too many arguments (9b28aad)
• normalized keys were not enumerable (#247) (57119f9)
• only run coercion functions once, despite aliases. (#76) (#103) (507aaef)
• scientific notation circumvented bounds check (#110) (3571f57)
• should populate "_" when given config with "short-option-groups" false (#179) (6055974)
• support keys that collide with object prototypes (#234) (1587b6d)
• support negative numbers with decimal places (#208) (850bbda)
• unknown options terminated with digits now handled by unknown-options-as-args (#238) (d36cdfa)
• unknown-options-as-args: '--' is not an unknown option (#207) (3fee2d8)
• take into account aliases when appending arrays from config object (#199) (f8a2d3f)
• tokenizer should ignore spaces at the beginning of the argString (#106) (f34ead9)

Reverts

• make requiresArg work in conjunction with arrays (#136) (f4a3063)
• revert 16.0.0 CHANGELOG entry (920320a)

Miscellaneous Chores

• update dependencies (6dc42a1)

Build System

• drops Node 6. begin following Node.js LTS schedule (#278) (9014ed7)
• moving to c8 for coverage and dropping Node 6 from build matrix (#209) (f3a9316)

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