chore: copied encode function from base62 to avoid dependency

Author: danpoletaev

package-lock.json

@@ -49,8 +49,7 @@
     },
     "dependencies": {
         "@apify/consts": "^2.37.0",
-        "@apify/log": "^2.5.13",
-        "base62": "^2.0.2"
+        "@apify/log": "^2.5.13"
     },
     "devDependencies": {
         "@types/create-hmac": "^1.1.0"

packages/utilities/package.json

@@ -1,6 +1,23 @@
 import crypto from 'crypto';
 
-import base62 from 'base62';
+const CHARSET = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
+
+/**
+ * Encodes number to base62.
+ * To avoid new dependency, this function was copied from https://github.com/base62/base62.js/blob/master/lib/ascii.js
+ */
+function encodeBase62(num: number) {
+    if (num === 0) {
+        return CHARSET[0];
+    }
+
+    let res = '';
+    while (num > 0) {
+        res = CHARSET[num % 62] + res;
+        num = Math.floor(num / 62);
+    }
+    return res;
+}
 
 /**
  * Generates an HMAC signature and encodes it using Base62.
@@ -16,5 +33,5 @@ export function createHmacSignature(secretKey: string, message: string): string
         .digest('hex')
         .substring(0, 30);
 
-    return base62.encode(parseInt(signature, 16));
+    return encodeBase62(parseInt(signature, 16));
 }