Bump rspec from 3.10.0 to 3.12.0

Bumps [rspec](https://github.com/rspec/rspec-metagem) from 3.10.0 to 3.12.0.
- [Release notes](https://github.com/rspec/rspec-metagem/releases)
- [Commits](rspec/rspec-metagem@v3.10.0...v3.12.0)

---
updated-dependencies:
- dependency-name: rspec
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -10,7 +10,7 @@ GEM
     codeclimate-test-reporter (0.4.1)
       simplecov (>= 0.7.1, < 1.0.0)
     coderay (1.1.2)
-    diff-lcs (1.4.4)
+    diff-lcs (1.5.0)
     docile (1.1.5)
     ffi (1.15.5)
     inch (0.8.0)
@@ -46,19 +46,19 @@ GEM
       ffi (>= 0.5.0)
     rb-kqueue (0.2.3)
       ffi (>= 0.5.0)
-    rspec (3.10.0)
-      rspec-core (~> 3.10.0)
-      rspec-expectations (~> 3.10.0)
-      rspec-mocks (~> 3.10.0)
-    rspec-core (3.10.0)
-      rspec-support (~> 3.10.0)
-    rspec-expectations (3.10.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.0)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-mocks (3.10.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-support (3.10.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.0)
     rubocop (0.49.1)
       parallel (~> 1.10)
       parser (>= 2.3.3.1, < 3.0)