Use .fill instead of loop

Author: nikeee

ts_src/index.ts

@@ -7,10 +7,7 @@
 function base (ALPHABET: string): base.BaseConverter {
   if (ALPHABET.length >= 255) throw new TypeError('Alphabet too long')
 
-  const BASE_MAP = new Uint8Array(256)
-  for (let j = 0; j < BASE_MAP.length; j++) {
-    BASE_MAP[j] = 255
-  }
+  const BASE_MAP = new Uint8Array(256).fill(255);
 
   for (let i = 0; i < ALPHABET.length; i++) {
     const x = ALPHABET.charAt(i)