Bump newrelic_rpm from 5.5.0.348 to 5.6.0.349

Bumps [newrelic_rpm](https://github.com/newrelic/rpm) from 5.5.0.348 to 5.6.0.349.
- [Release notes](https://github.com/newrelic/rpm/releases)
- [Changelog](https://github.com/newrelic/rpm/blob/master/CHANGELOG.md)
- [Commits](https://github.com/newrelic/rpm/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

Gemfile.lock

@@ -236,7 +236,7 @@ GEM
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
     net-ssh (5.0.2)
-    newrelic_rpm (5.5.0.348)
+    newrelic_rpm (5.6.0.349)
     nio4r (2.3.1)
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)