Version of EOSJS
20.0.0-beta2 , maybe earlier. Doesn't show with the 16.x versions.

Describe the bug
We are including eosjs in a firestore backed node project. When adding

  "eosjs": "20.0.0-beta2",

in package.json running tsc on the project directory returns with a code 2, which unfortunately breaks the firestore build process.

To Reproduce
Steps to reproduce the behavior:
see above.

Expected behavior
Return an exit code of 0

Screenshots

none

Desktop (please complete the following information):

• OS: Mac Os
• Node: 8.2.1
• tsc: 2.8.3, and 3.2.2

Additional context
Add any other context about the problem here.