Merge pull request #686 from rubycentral/dependabot/bundler/fastly-15.0.0

Bump fastly from 14.0.0 to 15.0.0

Author: amatsuda

Gemfile.lock

@@ -196,8 +196,9 @@ GEM
       http_parser.rb (~> 0)
     erb (5.1.3)
     erubi (1.13.1)
-    ethon (0.17.0)
+    ethon (0.18.0)
       ffi (>= 1.15.0)
+      logger
     eventmachine (1.2.7)
     execjs (2.10.0)
     factory_bot (6.5.5)
@@ -211,7 +212,7 @@ GEM
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
-    fastly (14.0.0)
+    fastly (15.0.0)
       typhoeus (~> 1.0, >= 1.0.1)
     ffi (1.17.2)
     foreman (0.90.0)