Bump mongoose from 5.4.16 to 5.4.19

[dependabot-preview[bot]]

Bumps mongoose from 5.4.16 to 5.4.19.

Changelog

*Sourced from [mongoose's changelog](https://github.com/Automattic/mongoose/blob/master/History.md).* > 5.4.19 / 2019-03-11 > =================== > * fix(mongoose): ensure virtuals set on subdocs in global plugins get applied [#7592](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7592) > * docs(tutorials): add "Working With Dates" tutorial [#7597](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7597) > * docs(guide): clarify that versioning only affects array fields [#7555](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7555) > * docs(model): list out all bulkWrite() options [#7550](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7550) > > 5.4.18 / 2019-03-08 > =================== > * fix(document): handle nested virtuals in populated docs when parent path is projected out [#7491](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7491) > * fix(model): make subclassed models handle discriminators correctly [#7547](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7547) > * fix(model): remove $versionError from save options for better debug output [#7570](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7570) > > 5.4.17 / 2019-03-03 > =================== > * fix(update): handle all positional operator when casting array filters [#7540](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7540) > * fix(populate): handle populating nested path where top-level path is a primitive in the db [#7545](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7545) > * fix(update): run update validators on array filters [#7536](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7536) > * fix(document): clean modified subpaths when sorting an array [#7556](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7556) > * fix(model): cast $setOnInsert correctly with nested docs [#7534](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7534) > * docs: remove extra curly brace from example [#7569](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7569) [kolya182](https://github.com/kolya182)

Commits

- [`5e47d8b`](https://github.com/Automattic/mongoose/commit/5e47d8be8b35599e4997d5f2ef88ef19c7853a32) chore: release 5.4.19 - [`6b40cbd`](https://github.com/Automattic/mongoose/commit/6b40cbd3d2fa3a8278c9a95207ffe792abbb6d52) docs(guides): add link to dates docs - [`702682d`](https://github.com/Automattic/mongoose/commit/702682d4b80e430680ccd6dddbf3892a2f26a7c8) docs(model): add bulkWrite() options - [`8b483c6`](https://github.com/Automattic/mongoose/commit/8b483c6c9c3004965ba5269f4d72df1aec334d75) test: fix date tutorial tests - [`14e8cd5`](https://github.com/Automattic/mongoose/commit/14e8cd511268be4b5fb8eb072cdef2a6cd846ff5) test: fix tests - [`7bdfe8c`](https://github.com/Automattic/mongoose/commit/7bdfe8c1adb90d07ac48bd35e8a6c7b2a3c41adf) test: fix tests - [`f2fc0ff`](https://github.com/Automattic/mongoose/commit/f2fc0ff34e346444666d453bad67f9d71134e688) Merge pull request [#7528](https://github-redirect.dependabot.com/Automattic/mongoose/issues/7528) from chrischen/master - [`0761fcc`](https://github.com/Automattic/mongoose/commit/0761fcc60f4e90d84b644281d0e6c9a43a0a4d7d) docs(tutorials): add date tutorial - [`26313ad`](https://github.com/Automattic/mongoose/commit/26313ad8e5ce6afb466dc6dbded7fe241a0c1a43) docs(guide): clarify that versioning only affects array fields - [`d870a31`](https://github.com/Automattic/mongoose/commit/d870a3178e3f76bcef8ac7013b825cc71cac9698) fix(mongoose): ensure virtuals set on subdocs in global plugins get applied - Additional commits viewable in [compare view](https://github.com/Automattic/mongoose/compare/5.4.16...5.4.19)

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[dependabot-preview[bot]]

Superseded by #174.