Re-enable two pending tests

Per the discussion in #3319 (comment), these only temporarily needed to be marked `pending` until #3327 was merged.

From the first thread it looks like the intent was to remove the `pending` comment, but that accidentally got overlooked.

So this removes them.

bundler/spec/dependabot/bundler/update_checker/version_resolver_spec.rb

@@ -173,7 +173,7 @@
 
         let(:dependency_files) { bundler_project_dependency_files("requires_bundler") }
 
-        pending "resolves version" do
+        it "resolves version" do
           expect(subject.version).to eq(Gem::Version.new("3.0.0"))
         end
       end
@@ -184,7 +184,7 @@
 
         let(:dependency_files) { bundler_project_dependency_files("requires_bundler") }
 
-        pending "raises a DependencyFileNotResolvable error" do
+        it "raises a DependencyFileNotResolvable error" do
           expect { subject }.
             to raise_error(Dependabot::DependencyFileNotResolvable)
         end