Update Defold min version to 1.12.1

Due to some mishap, the 9.xbranch was based on Defold 1.12.1 functionality but wasn't tagged/released accordingly.
This is the first step towards correcting that. Next release for Defold 1.12.1 will be in the 10.x range

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• rive runtime 3a5b5058aca009b823154ed7f92c11d599c00ae3