Update webmock to version 3.9.3

Gemfile.lock

@@ -70,8 +70,7 @@ GEM
       xpath (~> 3.2)
     childprocess (3.0.0)
     concurrent-ruby (1.1.7)
-    crack (0.4.3)
-      safe_yaml (~> 1.0.0)
+    crack (0.4.4)
     crass (1.0.6)
     dalli (2.7.10)
     e2mmap (0.1.0)
@@ -126,7 +125,7 @@ GEM
       ast (~> 2.4.1)
     pkg-config (1.3.2)
     prometheus_exporter (0.5.3)
-    public_suffix (4.0.5)
+    public_suffix (4.0.6)
     puma (4.3.5)
       nio4r (~> 2.0)
     puma_worker_killer (0.1.1)
@@ -184,7 +183,6 @@ GEM
       rubocop (>= 0.71.0)
     ruby-progressbar (1.10.1)
     rubyzip (2.0.0)
-    safe_yaml (1.0.5)
     sassc (2.2.1)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
@@ -232,7 +230,7 @@ GEM
       activemodel (>= 5.0)
       bindex (>= 0.4.0)
       railties (>= 5.0)
-    webmock (3.8.3)
+    webmock (3.9.3)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)