prepare 6.4.0 release (#241)

* Node 6 compatibility

* remove redundant helper, misc cleanup

* Node 6 compatibility

* fix comment

* change asyncify to promisifySingle

* misc fixes

* add Windows CircleCI job

* fix config

* syntax

* diagnostic events, part 2: initial event and stats, except for stream inits

* comments

* add test for stats event

* capture stream connection stats in diagnostic events

* fix test

* remove eventReportingDisabled from diagnostic event; only create diagnosticsManager if needed

* revise tests to use new helper package

* misc cleanup

* use launchdarkly-js-test-helpers 1.0.0

* fix package reference

* minor fixes to config validation messages + add comment

* diagnostic eventsInQueue counter should be # of events at last flush

* rename eventsInQueue to eventsInLastBatch

* don't let user fall outside of last bucket in rollout

* add unit tests for basic bucketing logic and edge case

* avoid redundant property lookups

* fix Redis client parameter to match TS declaration (but still support old incorrect parameter)

* add event payload ID

* remove mistakenly checked-in test code (note, this SDK key was only valid on staging)

* add mention of singleton usage

* update diagnostic event info for OS name, data store type, Node version

* standardize linting

* disallow window and document

* fix null/undef checks

* misc linting fixes

* inlineUsersInEvents is not an unknown option

* drop node-sha1 dependency

* don't omit streamInits.failed when it's false

* bump request dependency to get security patch; loosen some exact dependencies

* remove request package; improve polling cache logic + add test

* bump typescript version to fix build error in Node 6

* update @types/node to fix TypeScript check step

* lint

* make sure we keep polling regardless of whether we got new data

* use launchdarkly-eventsource, make stream retry behavior consistent

* stream retry delay option should be in seconds & should be included in diagnostics

* minor test fix

* fix: Throw an error on malformed user-supplied logger

* don't call unref() on Redis client; ensure that database integration tests close the store

* update Redis driver to major version 3

* add test case

* allow redisOpts parameter to be omitted

* add logger adapter shim + tests

* minor cleanup and comments for ch74741 fix (logger wrapper)

* fix proxy tunnel configuration and make sure it's used in streaming

* change some string concatenation expressions to use interpolation

* feat: upgrade winston (#189)

* fix merge

* remove support for indirect/patch and indirect/put (#182)

* reuse same Promise and same event listeners for all waitForInitialization calls

* better docs for waitForInitialization + misc doc cleanup (#184)

* update js-eventsource to 1.3.1 for stream parsing bugfix (#185)

* fix broken logger format (#186)

* retroactively update changelog for bugfix in 5.13.2 release

* allow get/getAll Redis queries to be queued if Redis client hasn't yet connected

* set stream read timeout

* adding the alias functionality (#190)

* Removed the guides link

* remove monkey-patching of setImmediate

* Persist contextKind property during feature and custom event transformations (#194)

* add inlineUsersInEvents option in TypeScript

* Add support for seed to bucketUser

* Add note for incorporating seed into evaluation

* Send events when the evaluation is from an experiment

* Use seed to evaluate.

* Clean up test descriptions

* Rename variable to be less confusing

* Use ternary to eliminate mutation

* Make return signature more consistent

* Un-prettier the tests

* redis lower bounds bump (#199)

* update launchdarkly-js-test-helpers to fix TLS tests (#200)

* update js-eventsource to remove vulnerability warning (#201)

* add CI jobs for all compatible Node versions

* CI fixes

* more CI fixes

* comment

* use default value to simplify config

* (6.0 - #1) stop saying we're compatible with Node <12 (#203)

* add CI jobs for all compatible Node versions (#202)

* (6.0 - #2) remove Redis integration (#204)

* allow feature store to be specified as a factory (so it can get our logger)

* (6.0 - #3) remove Winston (#205)

* remove deprecated things for 6.0 (#206)

* update node-cache to 5.x (drops old Node compat)

* update semver to 7.x (drops old Node compat)

* update uuid to 8.x (Node compat, perf improvements, bugfixes)

* update dev dependencies

* linter

* replace lrucache package with lru-cache (#209)

* make yaml dependency optional (#210)

* update release metadata to include maintenance branch

* remove package-lock.json (#211)

* rm prerelease changelog

* (big segments #1) add interfaces for big segments (#212)

* (big segments #2) add all components for big segments except evaluation (#213)

* (big segments #3) implement big segments in flag evaluation (#214)

* (big segments #4) add standard test suite for big segment store tests + refactor feature store tests (#215)

* move new interfaces to a module instead of a namespace (#216)

* fix TS export of CachingStoreWrapper

* use Releaser v2 config

* fix overly specific test expectation that breaks in Node 17

* Initial work on FlagBuilder (#219)

* Add TestData factory(with some dummy methods); Initial work on FlagBuilder

* fixed indentation and linter errors; fixed an error in update; fixed incorrect test label

* fixed typo in TestData store

* converted boolean variation constants to be file variables instead of class variables

Co-authored-by: charukiewicz <christian@foxhound.systems>
Co-authored-by: belevy <ben@foxhound.systems>

* implemented FlagRuleBuilder; added .build() methods to FlagBuilder/FlagRuleBuilder and changed tests to avoid using private interface

* converted _targets to be Map instead of object literal; changed variationForBoolean to be a module-scoped function instead class-scoped

* Implement stream processor(data source) interface for test data

* Add TestData to index.js and write out the types for TestData and friends

* added testdata documentation to index.d.ts; fix linter errors; changed flag default behavior to create boolean flag

* Fix the interface file: reindented to 2 spaces, corrected definition of functions from properties to functions in interfaces; corrected issues in JSDoc comments

* modify tests to fix capitalization and actually test the test datasource works as an LDClient updateProcessor.

* Fix linter error on defaulted callback

* explicitly enable JSDOM types in TypeScript build to avoid errors when jsdom is referenced for some reason

* capitalize Big Segments in docs & logs

* documentation comment fixes for TestData

* pin TypeScript to 4.4.x

* move TestData and FIleDataSource to integrations module

* lint

* rename types used by TestData for clarity (#229)

* use varargs semantics for TestFlagBuilder.variations() and add it to the TS interface (#230)

* don't ever use for...in (#232)

* don't ever use for...in

* add null guard

* bump launchdarkly-eventsource dependency for sc-136154 fix

* use TestData in our own tests (#231)

* use TestData in our own tests

* update TS interface

* lint

* typo

* fix allFlagsState behavior regarding experimentation

* lint

* allow "secondary" to be referenced in clauses

* don't throw an exception for non-string in semver comparison

* correctly handle "client not ready" condition in allFlagsState

* lint

* Flags with a version of 0 reported as 'unknown' in summary events. (#239)

* implement contract test service, not including big segments (#242)

Co-authored-by: Eli Bishop <eli@launchdarkly.com>

* Implement Application tags for the node SDK. (#241)

* update js-eventsource to 1.4.4 for security fix

Co-authored-by: Eli Bishop <eli@launchdarkly.com>
Co-authored-by: LaunchDarklyCI <dev@launchdarkly.com>
Co-authored-by: Ben Woskow <bwoskow@launchdarkly.com>
Co-authored-by: Maxwell Gerber <maxwell.gerber@mulesoft.com>
Co-authored-by: Chris West <solo-github@goeswhere.com>
Co-authored-by: Ben Woskow <48036130+bwoskow-ld@users.noreply.github.com>
Co-authored-by: Mike Zorn <mike@launchdarkly.com>
Co-authored-by: Robert J. Neal <rneal@launchdarkly.com>
Co-authored-by: Ben Levy <benjaminlevy007@gmail.com>
Co-authored-by: charukiewicz <christian@foxhound.systems>
Co-authored-by: belevy <ben@foxhound.systems>
Co-authored-by: charukiewicz <charukiewicz@protonmail.com>
Co-authored-by: LaunchDarklyReleaseBot <launchdarklyreleasebot@launchdarkly.com>
Co-authored-by: Ryan Lamb <4955475+kinyoklion@users.noreply.github.com>

Author: 12 people