Add update-version.sh script

So we don't forget to bump the version everywhere.

update-version.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -e
+
+if [ $# -ne 1 ]; then
+    echo "Usage: $0 <major.minor.patch>"
+    exit 1
+fi
+
+VERSION="$1"
+MAJOR=$(echo "$VERSION" | cut -d. -f1)
+MINOR=$(echo "$VERSION" | cut -d. -f2)
+PATCH=$(echo "$VERSION" | cut -d. -f3)
+
+if [ -z "$MAJOR" ] || [ -z "$MINOR" ] || [ -z "$PATCH" ]; then
+    echo "Error: version must be in major.minor.patch format"
+    exit 1
+fi
+
+sed -i.bak \
+    -e "s/^#define QJS_VERSION_MAJOR .*/#define QJS_VERSION_MAJOR $MAJOR/" \
+    -e "s/^#define QJS_VERSION_MINOR .*/#define QJS_VERSION_MINOR $MINOR/" \
+    -e "s/^#define QJS_VERSION_PATCH .*/#define QJS_VERSION_PATCH $PATCH/" \
+    quickjs.h
+
+sed -i.bak \
+    -e "s/^  version: '.*'/  version: '$VERSION'/" \
+    meson.build
+
+rm -f quickjs.h.bak meson.build.bak
+
+echo "Version updated to $VERSION"