* remove some key usage from core, refactor Operations.apply

* undeprecate some methods

* convert more key usage to paths

* update deprecations

* convert selection commands to use all paths

* refactor word boundary selection logic

* convert many at-range commands to use paths

* convert wrapBlock and wrapInline to not use keys

* cleanup

* remove chainability from editor

* simplify commands, queries and middleware

* convert deleteAtRange

* remove key usage from schema, deprecate *ByKey methods

* migrate *ByKey tests, remove index from *ByPath signatures

* rename at-current-range tests

* deprecate mode key usage, migrate more tests away from keys

* deprecate range and point methods which rely on keys to work

* refactor insertBlock, without fixing warnings

* add pathRef/pointRef, fix insertBlock/Inline deprecations, work on insertFragment

* refactor insertFragment

* get rich-text example rendering

* fix lint

* refactor query files, fix more tests

* remove unused queries, refactor others

* deprecate splitDescendantsByPath

* merge master

* add typescript, convert slate, slate-hyperscript, slate-plain-serializer

* add Point, Path, Range, Annotation tests

* add Annotation, Change, Element, Fragment, Mark, Range, Selection, Value interfaces tests

* add Operation and Text tests

* add Node tests

* get operations and normalization tests working for slate

* get *AtPath command tests passing

* rename *AtPath command tests

* rename

* get *AtPoint tests working

* rename

* rename

* add value queries tests

* add element, mark and path queries tests

* convert most on-selection tests

* convert on-selection commands

* rename

* get addMarks and delete commands working

* rename

* rename

* rename

* refactor value.positions(), work on delete tests

* progress on delete tests

* more delete work

* finish delete tests

* start converting to at-based commands

* restructure query tests

* restructure operations tests

* more work converting to multi-purpose commands

* lots of progress on converting to at-based commands

* add unwrapNodes

* remove setValue

* more progress

* refactor node commands to use consistent matching logic

* cleanup, get non-fragment commands passing

* remove annotations and isAtomic

* rename surround/pluck to cover/uncover

* add location concept, change at-path to from-path for iterables

* refactor batches

* add location-based queries

* refactor hanging logic

* more location query work

* renaming

* use getMatch more

* add split to wrap/unwrap

* flip levels/ancestors ordering

* switch splitNodes to use levels

* change split to always:false by default

* fix tests

* add more queries tests

* fixing more delete logic

* add more splitNodes tests

* get rest of delete tests passing

* fix location-based logic in some commands

* cleanup

* get previous packages tests passing again

* add slate-history package

* start slate-schema work

* start of react working

* rendering fixes

* get rich and plain text examples working

* get image example working with hooks and dropping

* refactor onDrop to be internal

* inline more event handlers

* refactor lots of event-related logic

* change rendering to use render props

* delete unused stuff

* cleanup dom utils

* remove unused deps

* remove unnecessary packages, add placeholder

* remove slate-react-placeholder package

* remove unused dep

* remove unnecessary tests, fix readonly example

* convert checklists example

* switch to next from webpack

* get link example working

* convert more examples

* preserve keys, memoized leafs/texts, fix node lookup

* fix to always useLayoutEffect for ordering

* fix annotations to be maps, memoize elements

* remove Change interface

* remove String interface

* rename Node.entries to Node.nodes

* remove unnecessary value queries

* default to selection when iterating, cleanup

* remove unused files

* update scroll into view logic

* fix undoing, remove constructor types

* dont sync selection while composing

* add workflows

* remove unused deps

* convert mentions example

* tweaks

* convert remaining examples

* rename h to jsx, update schema

* fix schema tests

* fix slate-schema logic and tests

* really fix slate-schema and forced-layout example

* get start of insertFragment tests working

* remove Fragment interface

* remove debugger

* get all non-skipped tests passing

* cleanup deps

* run prettier

* configure eslint for typescript

* more eslint fixes...

* more passing

* update some docs

* fix examples

* port windows undo hotkey change

* fix deps, add basic firefox support

* add event overriding, update walkthroughs

* add commands, remove classes, cleanup examples

* cleanup rollup config

* update tests

* rename queries tests

* update other tests

* update walkthroughs

* cleanup interface exports

* cleanup, change mark transforms to require location

* undo mark transform change

* more

* fix tests

* fix example

* update walkthroughs

* update docs

* update docs

* remove annotations

* remove value, move selection and children to editor

* add migrating doc

* fix lint

* fix tests

* fix DOM types aliasing

* add next export

* update deps, fix prod build

* fix prod build

* update scripts

* update docs and changelogs

* update workflow and pull request template