Update dependency rollup-plugin-typescript2 to v0.26.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
rollup-plugin-typescript2	devDependencies	minor	0.25.3 -> 0.26.0

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Release Notes

ezolenko/rollup-plugin-typescript2

### [`v0.26.0`](https://togithub.com/ezolenko/rollup-plugin-typescript2/releases/0.26.0) [Compare Source](https://togithub.com/ezolenko/rollup-plugin-typescript2/compare/0.25.3...0.26.0) [#​203](https://togithub.com/ezolenko/rollup-plugin-typescript2/issues/203) Updating object-hash to 2.0.2 with async support. Updating other dependencies.

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