Upgrade the OAuth module to the latest

[seratch]

Summary

This pull request upgrades the OAuth module to the latest (slackapi/node-slack-sdk#1605) and add HTML escape code for the developer mode. Since there is actually no possible way to inject parameters to the web page content generated by bolt-js, we don't need to release a new patch version immediately. This upgrade is just for preventing future issues.

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@0f90200). Click here to learn what that means.
The diff coverage is 0.00%.

❗ Current head 968371f differs from pull request most recent head c879904. Consider uploading reports for the commit c879904 to get more accurate results

@@           Coverage Diff           @@
##             main    #1802   +/-   ##
=======================================
  Coverage        ?   82.11%           
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  Files           ?       18           
  Lines           ?     1526           
  Branches        ?      442           
=======================================
  Hits            ?     1253           
  Misses          ?      175           
  Partials        ?       98           

Impacted Files	Coverage Δ
src/App.ts	83.75% <0.00%> (ø)

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