Update/Audit NPM Dependencies for 6.6

[desrosj]

Previously:

• #59658 (6.5)
• #58863 (6.4)
• #57657 (6.3)
• #57535 (6.2)
• #56641 (6.1)
• #54727 (6.0)
• #53361 (5.9)
• #52624 (5.8)
• #51801 (5.7)
• #50769 (5.6)
• #49768 (5.5)
• #49547 (5.4)
• #48203 (5.3)
• #46039 (5.1)
• #45064 (5.0)
• #38199 (4.7)
• #36520 (4.6)
• #35104 (4.5)
• #34177 (4.4)
• #31700 (4.3)
• #31489 (4.2)
• #30141 (4.1)
• #27340 (4.0)
• #26073 (3.9)

Trac ticket: https://core.trac.wordpress.org/ticket/61498

[desrosj]

In 58562:

Build/Test Tools: Update npm dependencies for Bundled Themes.

This updates the npm dependencies for the Twenty Nineteen, Twenty Twenty, and Twenty Twenty-One themes. npm audit fix has also been run.

See #61498.

[desrosj]

In 58563:

Build/Test Tools: Update npm devDependencies 6.6.

This updates the npm devDependencies for Core to their latest versions, with one exception. The latest version of sinon causes some test failures and requires more investigation.

Fixes #61498.

Merged in https://core.trac.wordpress.org/changeset/58562 and https://core.trac.wordpress.org/changeset/58563.

[desrosj]

In 58569:

Build/Test Tools: Run npm audit fix.

This runs npm audit fix to address upstream issues with dependencies.

See #61498.