Some tests are failing in node.js 14

[manidlou]

• Operating System: Ubuntu 18.04.4
• Node.js version: 14.2.0
• fs-extra version: 9.0.0

These tests are failing in node.js 14 while everything is fine in node.js 13!

1) fs-extra
       + createFile
         > when the file does exist
           should give clear error if node in directory tree is a file:
     TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined
      at Object.writeFileSync (fs.js:1380:5)
      at Context.<anonymous> (lib/ensure/__tests__/create.test.js:49:12)

  2) fs-extra
       + createFileSync
         > when the file does exist
           should give clear error if node in directory tree is a file:
     TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined
      at Object.writeFileSync (fs.js:1380:5)
      at Context.<anonymous> (lib/ensure/__tests__/create.test.js:82:12)

  3) remove
       + remove()
         should delete a directory full of directories and files:
     TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined
      at Object.writeFileSync (fs.js:1380:5)
      at buildFixtureDir (lib/remove/__tests__/remove.test.js:24:6)
      at Context.<anonymous> (lib/remove/__tests__/remove.test.js:47:7)