Js.chai

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* Merge pull request 423 from ehntoo/patch-1
* Merge pull request 422 from ljharb/fix_descriptor_tests
* Fix a small bug in the .null assertion docs
* Use a regex to account for property ordering issues across engines.
* Add `make test-firefox`
* Merge pull request 417 from astorije/astorije/minimalist-typo
* Remove trailing whitespaces
* Fix super minor typo in an example
* Merge pull request 408 from ljharb/enumerableProperty
* Add `ownPropertyDescriptor` assertion.

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* Merge pull request 405 from chaijs/deep-escape-doc-tweaks
* Tweak documentation on `.deep` flag.
* Merge pull request 402 from umireon/escaping-dot-should-be-taken
* Documentation of escaping in `.deep` flag.
* take regular expression apart
* Feature: backslash-escaping in `.deep.property`
* Escaping dot should be taken in deep property

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* Merge pull request 396 from chaijs/add-keith-cirkel-contributing-md
* Add Keith Cirkel to CONTRIBUTING.md
* Merge pull request 395 from cjqed/386-assert-operator-no-eval
* No longer using eval on assert operator 386
* Merge pull request 389 from chaijs/update-git-summary
* Update `git summary` in README

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* Merge pull request 385 from eldritch-fossicker/master
* updates to reflect code style preference from keithamus
* fix indexing into array with deep propery
* Merge pull request 382 from astorije/patch-2
* Merge pull request 383 from gurdiga/config-doc-wording-improvement
* config.truncateThreshold docs: simpler wording
* Add missing docstring for showDiff argument of assert
* Merge pull request 381 from astorije/patch-1
* Add a minor precision that empty asserts on strings too.
* Merge pull request 379 from dcneiner/should-primitive-fix
* Primitives now use valueOf in shouldGetter

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* Merge pull request 374 from jmm/v2.0.1
* Increment version to 2.0.1.
* Merge pull request 365 from chaijs/fix-travis
* Fix travis.yml deploy
* Merge pull request 356 from Soviut/master
* documented fail methods for expect and should interfaces
* fail method added directly to expect

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* Merge pull request 361 from gregglind/b265-keys-object
* fix 359. Add `.keys(object)`
* Merge pull request 359 from gregglind/b359-unexpected-keys-sort
* Fix 359 keys() sorts input unexpectedly
* contrib: publish release strategy and travis npm creds 337
* Merge pull request 357 from danilovaz/master
* Update copyright date
* Merge pull request 349 from toastynerd/add-which-chain-method
* add the which chain method as per issue 347
* Merge pull request 333 from cmpolis/change-assertions
* more `by` cleanup
* cleaned out `.by` for 333
* Merge pull request 335 from DingoEatingFuzz/expose-util
* Expose chai util through the chai object
* cleanup (per notes on pr 333)
* updated `change` to work w/ non-number values + tests
* Merge pull request 334 from hurrymaplelad/patch-1
* Typo, the flag is called 'contains' with an 's'
* updated assertion interface with `change` (330)
* added `change`,`increase`,`decrease` assertions (330)
* assert tests for `change`,`increase`,`decrease`
* expect/should tests for `change`,`increase`,`decrease`
* Merge pull request 328 from lo1tuma/issue-327
* Add includes and contains alias (fixes 327)
* Merge pull request 325 from chasenlehara/overwriteChainableMethodDocs
* Fix docs for overwriteChainableMethod parameters
* Merge pull request 317 from jasonkarns/patch-2
* Merge pull request 318 from jasonkarns/patch-3
* Merge pull request 316 from jasonkarns/patch-1
* typos in docs
* minor docs typo
* update docs: getAllFlags -> transferFlags
* Merge pull request 313 from cjqed/254-expect-any-all
* Added the all and any flags for keys assertion, with all being the default behavior
* Merge pull request 312 from cjqed/291-assert-same-deep-members
* Changed public comment of sameDeepMemebers to be more clear
* Fixes issue 291, adds assert.sameDeepMembers
* Merge pull request 311 from cjqed/305-above-below-on-assert
* Merge pull request 308 from prodatakey/hasproperty
* Issue 305 fixed, added assert.isAbove and assert.isBelow
* Fix typo
* More unit tests for new utility functions
* Refactor common functionality, document, test
* Refactor if statement out
* Small unit test fix
* Handle array indexing terminating paths
* Merge pull request 309 from ericdouglas/iterableEqual-couting-once
* couting variables just once
* Fix properties with `undefined` value pass property assertion
* Merge pull request 306 from chaijs/revert-297-noopchainfunc
* Revert "Allows writing lint-friendly tests"