Bump sexp_processor from 4.15.0 to 4.15.1

Bumps [sexp_processor](https://github.com/seattlerb/sexp_processor) from 4.15.0 to 4.15.1.
- [Release notes](https://github.com/seattlerb/sexp_processor/releases)
- [Changelog](https://github.com/seattlerb/sexp_processor/blob/master/History.rdoc)
- [Commits](seattlerb/sexp_processor@v4.15.0...v4.15.1)

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

Author: dependabot-preview[bot]

Gemfile.lock

@@ -360,7 +360,7 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
-    sexp_processor (4.15.0)
+    sexp_processor (4.15.1)
     signet (0.14.0)
       addressable (~> 2.3)
       faraday (>= 0.17.3, < 2.0)