Update fog requirement from ~> 1.36 to >= 1.36, < 3.0

Updates the requirements on [fog](https://github.com/fog/fog) to permit the latest version.
- [Release notes](https://github.com/fog/fog/releases)
- [Changelog](https://github.com/fog/fog/blob/master/CHANGELOG.md)
- [Commits](fog/fog@v1.36.0...v2.2.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

resumable_upload.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "rails", "~> 4.0"
   s.add_dependency "bson", "~> 3.1"
-  s.add_dependency "fog", "~> 1.36"
+  s.add_dependency "fog", ">= 1.36", "< 3.0"
   s.add_dependency "dotenv"
 
   s.add_development_dependency "pry"