feat: update to latest D1 Database interface

Summary

The D1 Database exec method has changed an now expects a ExecResult instead of a Result<T>. If you're using the latest @cloudflare/workers-types, the ORM response will be incorrect for methods like CreateTable or DropTable, which use exec under the hood. This PR bumps to the latest version and makes slight changes to fix this return type.

Details

The latest D1 APIs can be found here. The is what exec looks like:

exec(query: string): Promise<D1ExecResult>;

And D1ExecResult:

interface D1ExecResult {
  count: number;
  duration: number;
}

The proposed changes simply swap out the outdated return type of D1Result<T> for D1ExecResult where needed. Also, chai was updated in order to fix an import issue in the tests.

How it was tested

After updating these deps and making slight changes to database.ts and model.ts, the tests pass without needing any changes.

Interactions-as-a-Service / d1-orm