[3rdparty] Bump symfony deps to 4.4.15

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
This commit is contained in:
Roeland Jago Douma
2020-10-08 11:09:42 +02:00
committed by Morris Jobke
parent 2ec160aec8
commit 87be12e958