Merge branch '168-put-m2m' into 'master'

Resolve "Issue with ManyToManyField while PUTting resource"

Closes #168

See merge request !93
1 job for 168-str in 1 minute and 21 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #7312
sib
test

00:01:21