Update bootsnap to fix CI failures on ruby 3.0.3 (#926)

This seems to fix CI failures when ruby 3.0.3 is installed.

I noticed the failures in this PR: #915

But I was able to reproduce the failures on a clean branch using ruby 3.0.3

Related: Shopify/bootsnap#378

Gemfile.lock

@@ -56,7 +56,7 @@ GEM
       html_tokenizer (~> 0.0.6)
       parser (>= 2.4)
       smart_properties
-    bootsnap (1.9.1)
+    bootsnap (1.9.3)
       msgpack (~> 1.0)
     builder (3.2.4)
     capybara (3.35.3)

demo/Gemfile.lock

@@ -31,7 +31,7 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
       zeitwerk (~> 2.3)
-    bootsnap (1.4.7)
+    bootsnap (1.9.3)
       msgpack (~> 1.0)
     builder (3.2.4)
     concurrent-ruby (1.1.9)
@@ -49,11 +49,13 @@ GEM
     method_source (1.0.0)
     mini_portile2 (2.6.1)
     minitest (5.14.4)
-    msgpack (1.3.3)
+    msgpack (1.4.2)
     nio4r (2.5.8)
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
+    nokogiri (1.12.5-x86_64-darwin)
+      racc (~> 1.4)
     octicons (15.2.0)
     puma (5.5.1)
       nio4r (~> 2.0)