Add missing deps.cljs file.

Author: niwinz

assets/deps.cljs

@@ -0,0 +1,5 @@
+{:foreign-libs
+ [{:file "_decimal.js/decimal.js"
+   :file-min "_decimal.js/decimal.min.js"
+   :provides ["decimal.extern.decimaljs"]}]
+ :externs ["_decimal.js/externs.js"]}