Bump rspec from 3.12.0 to 3.13.0 (#98)

Gemfile

@@ -9,7 +9,7 @@ gemspec
 
 gem 'bundler', '~> 2.4'
 gem 'rake', '~> 13.1'
-gem 'rspec', '~> 3.12'
+gem 'rspec', '~> 3.13'
 gem 'rubocop', '~> 1.60'
 gem 'rubocop-performance', '~> 1.20'
 gem 'rubocop-rake', '~> 0.6'

Gemfile.lock

@@ -8,7 +8,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     json (2.7.1)
     language_server-protocol (3.17.0.3)
     matrix (0.4.2)
@@ -21,19 +21,19 @@ GEM
     rake (13.1.0)
     regexp_parser (2.9.0)
     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 (3.12.2)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.3)
+    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 (1.60.2)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
@@ -70,7 +70,7 @@ PLATFORMS
 DEPENDENCIES
   bundler (~> 2.4)
   rake (~> 13.1)
-  rspec (~> 3.12)
+  rspec (~> 3.13)
   rubocop (~> 1.60)
   rubocop-performance (~> 1.20)
   rubocop-rake (~> 0.6)