Update dependency date-fns-tz to v1.1.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
date-fns-tz	1.1.4 -> 1.1.6

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Release Notes

marnusw/date-fns-tz

### [`v1.1.6`](https://togithub.com/marnusw/date-fns-tz/blob/master/CHANGELOG.md#v116-27-July-2021) [Compare Source](https://togithub.com/marnusw/date-fns-tz/compare/v1.1.5...v1.1.6) - \[BUGFIX] Added an error object to the catch of isValidTimezoneIANAString for older JS ([#​131](https://togithub.com/marnusw/date-fns-tz/issues/131)) ### [`v1.1.5`](https://togithub.com/marnusw/date-fns-tz/blob/master/CHANGELOG.md#v115-27-July-2021) [Compare Source](https://togithub.com/marnusw/date-fns-tz/compare/v1.1.4...v1.1.5) - \[BUGFIX] Fixing parsing IANA strings ([#​129](https://togithub.com/marnusw/date-fns-tz/issues/129))

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