Import from deep_merge directly instead of the mod.ts to avoid pullin…

…g in unnecessary code. (#24)

src/deps.ts

@@ -1,4 +1,4 @@
-export { deepMerge } from "https://deno.land/[email protected]/collections/mod.ts";
+export { deepMerge } from "https://deno.land/[email protected]/collections/deep_merge.ts";
 export { parse } from "https://deno.land/[email protected]/flags/mod.ts";
 export { ensureDir } from "https://deno.land/[email protected]/fs/mod.ts";
 export * as path from "https://deno.land/[email protected]/path/mod.ts";