Bump rspec from 3.8.0 to 3.13.0

Bumps [rspec](https://github.com/rspec/rspec-metagem) from 3.8.0 to 3.13.0.
- [Commits](rspec/rspec-metagem@v3.8.0...v3.13.0)

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

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

Gemfile.lock

@@ -13,7 +13,7 @@ GEM
     coderay (1.1.3)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    diff-lcs (1.3)
+    diff-lcs (1.5.1)
     dotenv (2.8.1)
     hashdiff (1.0.0)
     httparty (0.21.0)
@@ -35,19 +35,19 @@ GEM
     rake (12.3.3)
     regexp_parser (2.9.2)
     rexml (3.3.8)
-    rspec (3.8.0)
-      rspec-core (~> 3.8.0)
-      rspec-expectations (~> 3.8.0)
-      rspec-mocks (~> 3.8.0)
-    rspec-core (3.8.2)
-      rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.4)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.1)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-mocks (3.8.1)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-support (3.8.2)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
     rubocop (1.10.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)