fix(deps): update dependency @imgix/js-core to v3.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@imgix/js-core	3.1.3 -> 3.2.1

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Release Notes

imgix/js-core

### [`v3.2.1`](https://togithub.com/imgix/js-core/blob/master/CHANGELOG.md#v321-httpsgithubcomimgixjs-corecomparev320v321-2021-06-28) [Compare Source](https://togithub.com/imgix/js-core/compare/v3.2.0...v3.2.1) - build: remove stale `.d.ts` file from `dist` ([#​293](https://togithub.com/imgix/js-core/pull/293)) ### [`v3.2.0`](https://togithub.com/imgix/js-core/blob/master/CHANGELOG.md#v320-httpsgithubcomimgixjs-corecomparev313v320-2021-06-22) [Compare Source](https://togithub.com/imgix/js-core/compare/v3.1.3...v3.2.0) - feat: export srcset TypeScript interface ([#​283](https://togithub.com/imgix/js-core/pull/283)) - fix: remove "v" prefix from `VERSION` constant ([#​289](https://togithub.com/imgix/js-core/pull/289)) - fix: ensure `undefined` parameters not added to url ([#​286](https://togithub.com/imgix/js-core/pull/286))

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:tada: This PR is included in version 1.7.2 :tada:

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