chore(deps): update dependency @ionic/angular to v4.3.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
@​ionic/angular	dependencies	patch	4.3.0 -> 4.3.1	source

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Release Notes

ionic-team/ionic

### [`v4.3.1`](https://togithub.com/ionic-team/ionic/blob/master/CHANGELOG.md#​431httpsgithubcomionic-teamioniccomparev430v431-2019-04-26) [Compare Source](https://togithub.com/ionic-team/ionic/compare/v4.3.0...v4.3.1) ##### Bug Fixes - **angular:** support replaceUrl with angular <7.2 ([#​18106](https://togithub.com/ionic-team/ionic/issues/18106)) ([eb3cbe4](https://togithub.com/ionic-team/ionic/commit/eb3cbe4)) - **security:** sanitize components using innerHTML ([#​18146](https://togithub.com/ionic-team/ionic/issues/18146)) ([b839e6f](https://togithub.com/ionic-team/ionic/commit/b839e6f))

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