Update rspec requirement from ~> 2.99.0 to ~> 3.10.0

Updates the requirements on [rspec](https://github.com/rspec/rspec) to permit the latest version.
- [Release notes](https://github.com/rspec/rspec/releases)
- [Commits](rspec/rspec@v3.9.0...v3.10.0)

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

Author: dependabot-preview[bot]

Gemfile.lock

@@ -11,7 +11,7 @@ GEM
       thor (~> 0.18)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
-    diff-lcs (1.4.2)
+    diff-lcs (1.4.4)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
     git (1.4.0)
@@ -60,19 +60,19 @@ GEM
     rake (12.3.3)
     rdoc (6.3.1)
     rexml (3.2.5)
-    rspec (3.9.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.2)
-      rspec-support (~> 3.9.3)
-    rspec-expectations (3.9.2)
+    rspec (3.10.0)
+      rspec-core (~> 3.10.0)
+      rspec-expectations (~> 3.10.0)
+      rspec-mocks (~> 3.10.0)
+    rspec-core (3.10.1)
+      rspec-support (~> 3.10.0)
+    rspec-expectations (3.10.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.1)
+      rspec-support (~> 3.10.0)
+    rspec-mocks (3.10.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-support (3.9.3)
+      rspec-support (~> 3.10.0)
+    rspec-support (3.10.2)
     rubocop (0.83.0)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)

graphite_client.gemspec

@@ -45,18 +45,18 @@ Gem::Specification.new do |s|
       # https://stackoverflow.com/a/35893625
       s.add_development_dependency(%q<rake>, "< 14.0")
       #
-      s.add_development_dependency(%q<rspec>, ["~> 2.99.0"])
+      s.add_development_dependency(%q<rspec>, "~> 3.10.0")
       s.add_development_dependency(%q<rdoc>, ["~> 6.0.4"])
       s.add_development_dependency(%q<bundler>, ["~> 1.16.1"])
       s.add_development_dependency(%q<jeweler>, ["~> 2.3.9"])
     else
-      s.add_dependency(%q<rspec>, ["~> 2.11.0"])
+      s.add_dependency(%q<rspec>, "~> 3.10.0")
       s.add_dependency(%q<rdoc>, ["~> 3.12"])
       s.add_dependency(%q<bundler>, ["~> 1.2.0"])
       s.add_dependency(%q<jeweler>, ["~> 1.8.4"])
     end
   else
-    s.add_dependency(%q<rspec>, ["~> 2.11.0"])
+    s.add_dependency(%q<rspec>, "~> 3.10.0")
     s.add_dependency(%q<rdoc>, ["~> 3.12"])
     s.add_dependency(%q<bundler>, ["~> 1.2.0"])
     s.add_dependency(%q<jeweler>, ["~> 1.8.4"])