v4.31.0-patch.2

Includes

• #1
• #2
• #3
• #4
• #5
• #6
• #7
• #8

Full Diff: main...v4.31.0-patch.2

What's Changed

• [php][ext] - Fix isset behaviour when field doesn't have presence by @FabioBatSilva in #8

Full Changelog: v4.31.0-patch...v4.31.0-patch.2