fix(core): add proguard rule to keep JSON deserializers

[lucasfernog]

Closes tauri-apps/plugins-workspace#894

[github-actions]

Package Changes Through e2db405

There are 8 changes which include tauri with prerelease, tauri-utils with prerelease, tauri-cli with prerelease, @tauri-apps/cli with prerelease, tauri-codegen with prerelease, tauri-bundler with prerelease, @tauri-apps/api with prerelease, tauri-build with prerelease

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
@tauri-apps/api	2.0.0-rc.3	2.0.0-rc.4
tauri-utils	2.0.0-rc.6	2.0.0-rc.7
tauri-bundler	2.0.1-rc.5	2.0.1-rc.6
tauri-runtime	2.0.0-rc.6	2.0.0-rc.7
tauri-runtime-wry	2.0.0-rc.6	2.0.0-rc.7
tauri-codegen	2.0.0-rc.6	2.0.0-rc.7
tauri-macros	2.0.0-rc.5	2.0.0-rc.6
tauri-plugin	2.0.0-rc.6	2.0.0-rc.7
tauri-build	2.0.0-rc.6	2.0.0-rc.7
tauri	2.0.0-rc.6	2.0.0-rc.7
@tauri-apps/cli	2.0.0-rc.7	2.0.0-rc.8
tauri-cli	2.0.0-rc.7	2.0.0-rc.8

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