Update package version to 2.8.4

info.yml

@@ -1,6 +1,6 @@
 name: expat
 description: XML parsing library
-version: 2.8.3
+version: 2.8.4
 revision: 1
 url: https://libexpat.github.io/
 license: MIT
@@ -24,4 +24,4 @@ downloads:
   - url: https://github.com/libexpat/libexpat/releases/download/R_${BPM_PKG_VERSION//./_}/expat-${BPM_PKG_VERSION}.tar.gz
     extract_to: ${BPM_SOURCE}
     extract_strip_components: 1
-    checksum: 22920a86c83f32300b11463635b71f11137a917975af297725e55525027d4e50
+    checksum: b8ece2437692dad44d851c4532723390a5a330990007706be9c8d2b90d294f36