pendulum just perform the same as datetime in convert

[crawlersick]

pendulum just perform the same as datetime
add this to support python type pendulum to mysql type
related issue pls ref to apache/airflow#10795

[mysql-oca-bot]

Hi, thank you for submitting this pull request. In order to consider your code we need you to sign the Oracle Contribution Agreement (OCA). Please review the details and follow the instructions at https://oca.opensource.oracle.com/
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[crawlersick]

I have signed the Oracle Contribution Agreement (OCA). @nmariz

[mysql-oca-bot]

Hi, thank you for your contribution. Please confirm this code is submitted under the terms of the OCA (Oracle's Contribution Agreement) you have previously signed by cutting and pasting the following text as a comment:
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[crawlersick]

I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it.

[mysql-oca-bot]

Hi, thank you for your contribution. Your code has been assigned to an internal queue. Please follow
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[crawlersick]

thx for the update, it is really a better way to code instead of directly 'hack in source code'.