Merge pull request #820 from rubycentral/dependabot/bundler/fastly-15.1.0

Bump fastly from 15.0.0 to 15.1.0

Author: amatsuda

Gemfile.lock

@@ -183,7 +183,7 @@ GEM
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
-    fastly (15.0.0)
+    fastly (15.1.0)
       typhoeus (~> 1.0, >= 1.0.1)
     ffi (1.17.2)
     foreman (0.90.0)