Bump newrelic from 4.18.0.118 to 4.20.0.120 (#4997)

Bumps [newrelic](http://newrelic.com/docs/python/new-relic-for-python) from 4.18.0.118 to 4.20.0.120.

Signed-off-by: dependabot[bot] <support@dependabot.com>

requirements/common.txt

@@ -70,8 +70,8 @@ simplejson==3.16.0 \
     --hash=sha256:65b41a5cda006cfa7c66eabbcf96aa704a6be2a5856095b9e2fd8c293bad2b46 \
     --hash=sha256:c206f47cbf9f32b573c9885f0ec813d2622976cf5effcf7e472344bc2e020ac1
 
-newrelic==4.18.0.118 \
-    --hash=sha256:3cd496022c6906ee3cdbf27c67ec3e03922830bfebbca4549ef6f2e58cf719e2
+newrelic==4.20.0.120 \
+    --hash=sha256:df880bc3b5da8d4ecb6c3e743d21b0a08cfbd911e5eef8873511480ceb20a2a5
 
 # Required by Django
 mysqlclient==1.4.2.post1 \