Fix module issue in CI

[tsmock]

(node:1808) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
(Use `node --trace-warnings ...` to show where the warning was created)
/home/runner/work/tag2link/tag2link/build.ts:2
import { isDeepStrictEqual } from "util";
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at wrapSafe (node:internal/modules/cjs/loader:1378:20)
    at Module._compile (node:internal/modules/cjs/loader:1428:41)
    at Module.m._compile (/home/runner/work/tag2link/tag2link/node_modules/ts-node/src/index.ts:1618:23)
    at Module._extensions..js (node:internal/modules/cjs/loader:1548:10)
    at Object.require.extensions.<computed> [as .ts] (/home/runner/work/tag2link/tag2link/node_modules/ts-node/src/index.ts:1621:12)
    at Module.load (node:internal/modules/cjs/loader:1288:32)
    at Function.Module._load (node:internal/modules/cjs/loader:1104:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:174:12)
    at phase4 (/home/runner/work/tag2link/tag2link/node_modules/ts-node/src/bin.ts:649:14)
    at bootstrap (/home/runner/work/tag2link/tag2link/node_modules/ts-node/src/bin.ts:95:10)

The fix is to use nodenext for moduleResolution.