Type 'T' recursively references itself as a base type. ts(2310)

[joshmanders]

This shows up in the following contracts app side:

• contracts/drive.ts
• contracts/hash.ts
• contracts/mail.ts
• contracts/redis.ts

This doesn't harm too much in the app, except builds break because TypeScript complains on compile. We can avoid it by using --ignore-ts-errors flag in the build command. But we should figure out a solution to this.