Merge branch 'bump-wp-compat' into 'master'

Bump WP compatibility

See merge request !3
3 jobs for v1.3.1 in 2 minutes and 56 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #6085
allowed to fail
PHPunit:PHP7.2:MySQL

00:02:28

failed #6086
allowed to fail
PHPunit:PHP7.3:MySQL

00:02:26

 
  Deploy
passed #6087
PluginSVN

00:00:28

 
Name Stage Failure
failed
PHPunit:PHP7.2:MySQL Test
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PHPunit:PHP7.3:MySQL Test
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