It looks like TSDX is not maintained: jaredpalmer/tsdx#1065
As an alternative I suggest to migrate to plain Rollup. eslint-plugin-mobx is already using Rollup without TSDX.
I'd be happy to work on this feature to get better understanding how to build frontend libraries.
UPD: Lerna is also unmaintained: lerna/lerna#2703
It looks like TSDX is not maintained: jaredpalmer/tsdx#1065
As an alternative I suggest to migrate to plain Rollup.
eslint-plugin-mobxis already using Rollup without TSDX.I'd be happy to work on this feature to get better understanding how to build frontend libraries.
UPD: Lerna is also unmaintained: lerna/lerna#2703