Add php ext sockets

[GregoireHebert]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	none
License	MIT

Fix the coverage in PHP 7.4

[vincentchalamon]

👍 if CI is green

[codecov]

Codecov Report

Merging #94 into v5 will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                 v5      #94   +/-   ##
=========================================
  Coverage     77.42%   77.42%           
  Complexity      229      229           
=========================================
  Files            36       36           
  Lines           988      988           
=========================================
  Hits            765      765           
  Misses          223      223           

Flag	Coverage Δ	Complexity Δ
#phpunit	77.42% <ø> (ø)	229.00 <ø> (ø)

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