dep: Update ReactiveUI to v19 (major)

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ReactiveUI.Fody (source)	nuget	major	18.4.44 -> 19.2.1
ReactiveUI.WPF (source)	nuget	major	18.4.44 -> 19.2.1

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Release Notes

reactiveui/reactiveui

### [`v19.2.1`](https://togithub.com/reactiveui/ReactiveUI/releases/tag/19.2.1) [Compare Source](https://togithub.com/reactiveui/reactiveui/compare/18.4.44...19.2.1) ##### Dependencies: - [`df72080`](https://togithub.com/reactiveui/reactiveui/commit/df72080c7e4c34fe0dc9d2d03fbbec5812fe5305) build(deps): bump Nerdbank.GitVersioning from 3.6.128 to 3.6.133 in /src ([#​3548](https://togithub.com/reactiveui/reactiveui/issues/3548)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`ac425f5`](https://togithub.com/reactiveui/reactiveui/commit/ac425f50e6ad7f5878c366d11dc42270c2a051d0) build(deps): bump coverlet.msbuild from 3.2.0 to 6.0.0 in /src ([#​3552](https://togithub.com/reactiveui/reactiveui/issues/3552)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`ff01c2b`](https://togithub.com/reactiveui/reactiveui/commit/ff01c2bb95fd84b12a317469efab5dd6ea204b49) build(deps): bump Microsoft.NET.Test.Sdk from 17.5.0 to 17.6.0 in /src ([#​3551](https://togithub.com/reactiveui/reactiveui/issues/3551)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`89a8a5c`](https://togithub.com/reactiveui/reactiveui/commit/89a8a5c9be172499cb4730c64876f4b8429caa81) build(deps): bump Microsoft.NET.Test.Sdk in /integrationtests ([#​3555](https://togithub.com/reactiveui/reactiveui/issues/3555)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`39cd682`](https://togithub.com/reactiveui/reactiveui/commit/39cd682dadc0b3bc633034d7c7d3dc49e8a4821a) build(deps): bump Verify.Xunit from 19.14.0 to 20.3.0 in /integrationtests ([#​3542](https://togithub.com/reactiveui/reactiveui/issues/3542)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`10c6a06`](https://togithub.com/reactiveui/reactiveui/commit/10c6a06fc7717edbda753d8725a03ca5d8c81b63) build(deps): bump Microsoft.Reactive.Testing from 5.0.0 to 6.0.0 in /integrationtests ([#​3550](https://togithub.com/reactiveui/reactiveui/issues/3550)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`8fe2754`](https://togithub.com/reactiveui/reactiveui/commit/8fe27545b7e90f7fd37206d215d0ad8dce63ab02) build(deps): bump Xamarin.Jetbrains.Annotations from 24.0.1 to 24.0.1.2 in /integrationtests ([#​3553](https://togithub.com/reactiveui/reactiveui/issues/3553)) [@​dependabot](https://togithub.com/dependabot)\[bot] - [`578ae2f`](https://togithub.com/reactiveui/reactiveui/commit/578ae2fef8cbcafd4d46ccd13659c5b8bdd86c7f) build(deps): bump Microsoft.WindowsAppSDK from 1.3.230331000 to 1.3.230502000 in /src ([#​3543](https://togithub.com/reactiveui/reactiveui/issues/3543)) [@​dependabot](https://togithub.com/dependabot)\[bot] ##### Housekeeping: - [`f2106ce`](https://togithub.com/reactiveui/reactiveui/commit/f2106ce2d088c9362145558556c4da2c716de183) housekeeping: Update version.json [@​glennawatson](https://togithub.com/glennawatson)

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