Update dependency rspec to v3.13.1

Author: renovate[bot]

Gemfile.lock

@@ -1,26 +1,26 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    diff-lcs (1.3)
+    diff-lcs (1.6.2)
     knapsack (1.14.0)
       rake
     nio4r (2.7.3)
     puma (5.6.9)
       nio4r (~> 2.0)
     rake (13.0.1)
-    rspec (3.6.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-    rspec-core (3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-expectations (3.6.0)
+    rspec (3.13.1)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.5)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-mocks (3.6.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-support (3.6.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.4)
 
 PLATFORMS
   ruby