Update python-snapcast to 2.3.7 (Fix player deletion) (#2161)

This PR updates the `python-snapcast` library to version 2.3.7. The
changes in this PR are a result of this update, which includes a fix for
the provider method that allows deleting music players.

diff --cc requirements_all.txt
index f1d54058fd166311cc0262b88d47c0a2ec2eadd6,fb453c2b4a14403cbba269ebbb582f5f6fc099e4..039480d42aef301e9954a3e3254c0adbf0fd4109
--- 1/requirements_all.txt
--- 2/requirements_all.txt
+++ b/requirements_all.txt
@@@ -47,9 -47,9 +47,9 @@@ pywidevine==1.8.
  radios==0.3.2
  setuptools>=1.0.0
  shortuuid==1.0.13
- snapcast==2.3.6
+ snapcast==2.3.7
  soco==0.30.9
 -soundcloudpy==0.1.2
 +soundcloudpy==0.1.3
  sxm==0.2.8
  unidecode==1.4.0
  websocket-client==1.8.0