build(deps): bump rexml in /functions/typed/googlechatbot (#1469)

Author: dependabot[bot]

functions/typed/googlechatbot/Gemfile.lock

@@ -55,7 +55,8 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.6)
+    rexml (3.3.6)
+      strscan
     ruby2_keywords (0.0.5)
     signet (0.18.0)
       addressable (~> 2.8)
@@ -68,6 +69,7 @@ GEM
       faraday-multipart
       gli
       hashie
+    strscan (3.1.0)
     trailblazer-option (0.1.2)
     uber (0.1.0)
     webrick (1.8.1)