Remove buffer dependency

src/utilities/number.ts

@@ -3,9 +3,10 @@
  * @param number The number to pack.
  * @returns The packed buffer.
  */
-export function numberToUint16BE (number: number): Buffer {
-  const ret = Buffer.alloc(2)
-  ret.writeUInt16BE(number)
+export function numberToUint16BE (number: number): Uint8Array {
+  const ret = new Uint8Array(2)
+  ret[0] = (number & 0xFF00) >> 8
+  ret[1] = (number & 0x00FF) >> 0
   return ret
 }
 
@@ -14,8 +15,11 @@ export function numberToUint16BE (number: number): Buffer {
  * @param number The number to pack.
  * @returns The packed buffer.
  */
-export function numberToUint32BE (number: number): Buffer {
-  const ret = Buffer.alloc(4)
-  ret.writeUInt32BE(number)
+export function numberToUint32BE (number: number): Uint8Array {
+  const ret = new Uint8Array(4)
+  ret[0] = (number & 0xFF000000) >> 24
+  ret[1] = (number & 0x00FF0000) >> 16
+  ret[2] = (number & 0x0000FF00) >> 8
+  ret[3] = (number & 0x000000FF) >> 0
   return ret
 }