Update HyperDB

[rebeccahum]

Description

Pulls in Automattic/HyperDB#140

Changelog Description

Plugin Updated: HyperDB

We upgraded HyperDB to fix PHP error addslashes(): Passing null to parameter #1 ($string) of type string is deprecated

Pre-review checklist

Please make sure the items below have been covered before requesting a review:

• This change works and has been tested locally (or has an appropriate fallback).
• This change works and has been tested on a Go sandbox.
• This change has relevant unit tests (if applicable).
• This change uses a rollout method to ease with deployment (if applicable - especially for large scale actions that require writes).
• This change has relevant documentation additions / updates (if applicable).
• I've created a changelog description that aligns with the provided examples.

Pre-deploy checklist

• VIP staff: Ensure any alerts added/updated conform to internal standards (see internal documentation).

Steps to Test

[codecov]

Codecov Report

Merging #4942 (d0f6b20) into develop (b2cc8b6) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             develop    #4942   +/-   ##
==========================================
  Coverage      29.20%   29.20%           
  Complexity      4746     4746           
==========================================
  Files            278      278           
  Lines          20903    20903           
==========================================
  Hits            6105     6105           
  Misses         14798    14798