Bump loofah from 2.0.3 to 2.3.1 in /test_apps/test_app_rails_5_1#2

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dependabot/bundler/test_apps/test_app_rails_5_1/loofah-2.3.1webhoernchen/massassignment_security_form:dependabot/bundler/test_apps/test_app_rails_5_1/loofah-2.3.1Copy head branch name to clipboard