use ES6 modules for all JavaScript

deploy_static

@@ -7,7 +7,7 @@ set -o errexit
 rm -rf static_tmp
 cp -a static static_tmp
 json_reformat -m < static_tmp/manifest.webmanifest | sponge static_tmp/manifest.webmanifest
-find static_tmp -name '*.js' -exec terser -cmo {} {} \;
+find static_tmp -name '*.js' -exec terser --module -cmo {} {} \;
 find static_tmp -regex '\(.+/LICENSE\|.+\.\(css\|html\|ico\|js\|svg\|txt\|webmanifest\|xml\)\)' -exec zopfli {} \; -exec touch -r {} {}.gz \;
 
 remote=www-data@grapheneos.org