Queue.take in SQLPool can produce deadlock

Describe the Bug
In SQLPool we use take on the queue to wait for a connection to become available. If no connections become available (for example if a single thread is using up all connections) it produces a deadlock causing a lockup of the entire application since all database queries will run into a deadlock

To Reproduce
Steps to reproduce the behavior:

1. Set the pool size to 1
2. Call get once
3. Call get a second time -> gets stuck

Expected behavior
The pool should use poll instead and throw an Exception after a reasonable amount of waiting time preventing a lockup of the entire application

Environment Information:

• Java Language Level 8
• Version 1.0.3

Additional Context
The root cause of this might be a different issue since the pool shouldn't have ran out of connections in the first place. We can check this issue once proper exceptions are thrown.

Queue.takeを使用するSQLPoolのパスから始め、getを2回呼び出して、プールサイズが1の場合に問題を再現します。現在のブロッキング動作を、想定される時間制限付きの待機およびExceptionと比較し、利用可能な接続がない場合でもアプリケーションが stuck のままにならないことを確認します。