Convert to ESM

__fixtures__/core.ts

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+import type * as core from '@actions/core'
+import { jest } from '@jest/globals'
+
+export const debug = jest.fn<typeof core.debug>()
+export const error = jest.fn<typeof core.error>()
+export const info = jest.fn<typeof core.info>()
+export const getInput = jest.fn<typeof core.getInput>()
+export const setOutput = jest.fn<typeof core.setOutput>()
+export const setFailed = jest.fn<typeof core.setFailed>()
+export const warning = jest.fn<typeof core.warning>()

__fixtures__/wait.ts

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+import { jest } from '@jest/globals'
+
+export const wait = jest.fn<typeof import('../src/wait.js').wait>()