Update core extension to 0.4.6

Author: simolus3

.changeset/eighty-cats-brake.md

@@ -0,0 +1,5 @@
+---
+"@powersync/sql-js": patch
+---
+
+Update PowerSync core extension to 0.4.6.

build.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 set -e
 
-POWERSYNC_CORE_VERSION="0.4.5"
+POWERSYNC_CORE_VERSION="0.4.6"
 SQLITE_PATH="sql.js"
 
 if [ -d "$SQLITE_PATH" ]; then