added version ranges to all packages on the 0.47.x lineage to ensure that 0.5x versions of libraries are treated as incompatible

* Fix dependencies

* Update links

* Add ./site to list of directories cleaned; when switching from branch 0.5x to 0.47 one tends to end up with an extraneous `site` folder

 - slate-base64-serializer@0.2.112
 - slate-html-serializer@0.8.11
 - slate-hyperscript@0.13.9
 - slate-plain-serializer@0.7.11
 - slate-prop-types@0.5.42
 - slate-react-placeholder@0.2.9
 - slate-react@0.22.10
 - slate@0.47.9

Bumps [macaddress](https://github.com/scravy/node-macaddress) from 0.2.8 to 0.2.9.
- [Release notes](https://github.com/scravy/node-macaddress/releases)
- [Commits](https://github.com/scravy/node-macaddress/compare/0.2.8...0.2.9

)

Signed-off-by: dependabot[bot] <support@github.com>

* Simplify the mentions example

* Fix wrong method call in onChange

* Return after inserting the mention

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 2.11.1 to 3.1.11.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-dev-server/compare/v2.11.1...v3.1.11

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [atob](https://github.com/coolaj86/node-browser-compat) from 2.0.3 to 2.1.2.
- [Release notes](https://github.com/coolaj86/node-browser-compat/releases)
- [Commits](https://github.com/coolaj86/node-browser-compat/commits

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [tar](https://github.com/npm/node-tar) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/npm/node-tar/releases)
- [Commits](https://github.com/npm/node-tar/compare/v2.2.1...v2.2.2

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [extend](https://github.com/justmoon/node-extend) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/justmoon/node-extend/releases)
- [Changelog](https://github.com/justmoon/node-extend/blob/master/CHANGELOG.md)
- [Commits](https://github.com/justmoon/node-extend/compare/v3.0.1...v3.0.2

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [sshpk](https://github.com/joyent/node-sshpk) from 1.13.0 to 1.16.1.
- [Release notes](https://github.com/joyent/node-sshpk/releases)
- [Commits](https://github.com/joyent/node-sshpk/compare/v1.13.0...v1.16.1

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [fstream](https://github.com/npm/fstream) from 1.0.11 to 1.0.12.
- [Release notes](https://github.com/npm/fstream/releases)
- [Commits](https://github.com/npm/fstream/compare/v1.0.11...v1.0.12

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.1 to 1.3.2.
- [Release notes](https://github.com/jonschlinkert/mixin-deep/releases)
- [Commits](https://github.com/jonschlinkert/mixin-deep/compare/1.3.1...1.3.2

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [clean-css](https://github.com/jakubpawlowicz/clean-css) from 4.1.9 to 4.1.11.
- [Release notes](https://github.com/jakubpawlowicz/clean-css/releases)
- [Changelog](https://github.com/jakubpawlowicz/clean-css/blob/master/History.md)
- [Commits](https://github.com/jakubpawlowicz/clean-css/compare/v4.1.9...v4.1.11

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.4 to 4.17.13.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.4...4.17.13

)

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [nwmatcher](https://github.com/dperini/nwmatcher) from 1.4.3 to 1.4.4.
- [Release notes](https://github.com/dperini/nwmatcher/releases)
- [Commits](https://github.com/dperini/nwmatcher/commits

)

Signed-off-by: dependabot[bot] <support@github.com>

These were missing, and `set_annotation` operations don't have
marks. This meant that when converting these operations to JS and
back, they could not become real annotations again.

in search-highlighting example, when search text is empty, no need to split text and addAnnotation

Change the name of the first argument of the serialize function from 'object' to 'obj' in the description to match what is used in the code.

* Removed 404 link of slate-dev-warning

* Removed 404 link of slate-simulator

Mark some events as 'user actions' to prevent scrolling when a programatic selection tranformation is performed (#3019)