DEV: bundle update fastimage (#13253)

DEV: bundle update fastimage (#13253)

FastImage 2.2.4 - includes a fix for BOM characters in SVG files, and HEIC support

diff --git a/Gemfile.lock b/Gemfile.lock
index 878c128..5a5bbfe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
     faraday-net_http_persistent (1.1.0)
     fast_blank (1.0.0)
     fast_xs (0.8.0)
-    fastimage (2.2.3)
+    fastimage (2.2.4)
     ffi (1.15.1)
     fspath (3.1.2)
     gc_tracer (1.5.1)

GitHub sha: 4a7c0433

This commit appears in #13253 which was approved by eviltrout. It was merged by jbrw.