Update webmock to version 3.20.0

Gemfile.lock

@@ -6,11 +6,13 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
+    bigdecimal (3.1.6)
     coderay (1.1.3)
-    crack (0.4.5)
+    crack (0.4.6)
+      bigdecimal
       rexml
     diff-lcs (1.4.4)
     docile (1.4.0)
@@ -37,7 +39,7 @@ GEM
     guard-rubocop (1.5.0)
       guard (~> 2.0)
       rubocop (< 2.0)
-    hashdiff (1.0.1)
+    hashdiff (1.1.0)
     listen (3.7.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -53,14 +55,14 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.6)
+    public_suffix (5.0.4)
     rainbow (3.0.0)
     rake (12.3.3)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.1.1)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -103,7 +105,7 @@ GEM
     thor (1.1.0)
     unicode-display_width (2.1.0)
     vcr (6.0.0)
-    webmock (3.14.0)
+    webmock (3.20.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)