Add same `sameSite=Lax` attribute to MP cookie (#464)

Add same sameSite=Lax attribute to MP cookie (#464)

diff --git a/lib/mini_profiler/client_settings.rb b/lib/mini_profiler/client_settings.rb
index b0f3ab7..058d661 100644
--- a/lib/mini_profiler/client_settings.rb
+++ b/lib/mini_profiler/client_settings.rb
@@ -76,6 +76,7 @@ module Rack
           settings_string = settings.map { |k, v| "#{k}=#{v}" }.join(",")
           cookie = { value: settings_string, path: '/', httponly: true }
           cookie[:secure] = true if @request.ssl?
+          cookie[:same_site] = 'Lax'
           Rack::Utils.set_cookie_header!(headers, COOKIE_NAME, cookie)
         end
       end

GitHub sha: 14ec989e

This commit appears in #464 which was merged by OsamaSayegh.