Bump fog-openstack from 0.1.25 to 0.3.10

Bumps [fog-openstack](https://github.com/fog/fog-openstack) from 0.1.25 to 0.3.10.
- [Release notes](https://github.com/fog/fog-openstack/releases)
- [Changelog](https://github.com/fog/fog-openstack/blob/master/CHANGELOG.md)
- [Commits](fog/fog-openstack@v0.1.25...v0.3.10)

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

Author: dependabot[bot]

Gemfile.lock

@@ -146,7 +146,7 @@ GEM
       eventmachine (>= 1.0.0.beta.4)
     erubi (1.9.0)
     eventmachine (1.0.9.1)
-    excon (0.71.0)
+    excon (0.76.0)
     faraday (0.17.3)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)
@@ -185,8 +185,8 @@ GEM
       multi_json (~> 1.10)
     fog-local (0.5.0)
       fog-core (>= 1.27, < 3.0)
-    fog-openstack (0.1.25)
-      fog-core (~> 1.40)
+    fog-openstack (0.3.10)
+      fog-core (>= 1.45, <= 2.1.0)
       fog-json (>= 1.0)
       ipaddress (>= 0.8)
     fog-xml (0.1.3)
@@ -561,7 +561,7 @@ DEPENDENCIES
   rubyzip (>= 1.3.0)
   scientist (~> 1.1.0)
   sequel (~> 5.0)
-  sinatra (= 2.0.8.1)
+  sinatra (~> 2.0)
   sinatra-contrib
   solargraph
   spork!