Update to node16 + recent versions of core and exec packages

src/utils/exec.ts

@@ -1,21 +0,0 @@
-import {exec as execImpl, ExecOptions} from '@actions/exec'
-
-// Wraps original exec() function
-// Returns exit code and whole stdout/stderr
-export default async function exec(commandLine: string, args?: string[], options?: ExecOptions): Promise<ExecResult> {
-  options = options || {}
-  let stdout = ''
-  let stderr = ''
-  options.listeners = {
-    stdout: (data: Buffer) => (stdout += data.toString()),
-    stderr: (data: Buffer) => (stderr += data.toString())
-  }
-  const code = await execImpl(commandLine, args, options)
-  return {code, stdout, stderr}
-}
-
-export interface ExecResult {
-  code: number
-  stdout: string
-  stderr: string
-}

src/utils/git.ts

@@ -1,11 +1,11 @@
 import * as core from '@actions/core'
-import exec from './exec'
+import {getExecOutput} from '@actions/exec'
 
 export async function listFiles(): Promise<string[]> {
   core.startGroup('Listing all files tracked by git')
   let output = ''
   try {
-    output = (await exec('git', ['ls-files', '-z'])).stdout
+    output = (await getExecOutput('git', ['ls-files', '-z'])).stdout
   } finally {
     fixStdOutNullTermination()
     core.endGroup()