Bump rspec from 3.12.0 to 3.13.0

Bumps [rspec](https://github.com/rspec/rspec-metagem) from 3.12.0 to 3.13.0.
- [Commits](rspec/rspec-metagem@v3.12.0...v3.13.0)

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

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

Gemfile

@@ -7,6 +7,6 @@ gemspec
 
 gem 'phony'
 gem 'rake', '~> 13.1'
-gem 'rspec', '~> 3.12'
+gem 'rspec', '~> 3.13'
 gem 'rubocop', '~> 1.53'
 gem 'rubocop-rspec'

Gemfile.lock

@@ -47,7 +47,7 @@ GEM
     concurrent-ruby (1.2.2)
     connection_pool (2.4.1)
     crass (1.0.6)
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     drb (2.2.0)
       ruby2_keywords
     erubi (1.12.0)
@@ -107,19 +107,19 @@ GEM
     reline (0.4.0)
       io-console (~> 0.5)
     rexml (3.2.6)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.1)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.2)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.5)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-support (3.12.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.0)
     rubocop (1.53.0)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
@@ -161,7 +161,7 @@ DEPENDENCIES
   lightweight_serializer!
   phony
   rake (~> 13.1)
-  rspec (~> 3.12)
+  rspec (~> 3.13)
   rubocop (~> 1.53)
   rubocop-rspec