fix: Specify promise type to match resolve() call

There has been typescript changes, where the value is required in the resolve callback for a new Promise. When resolve is called without arguments, we need to specify type void on the new Promise. More information: microsoft/TypeScript#39817

Author: agatakrajewska

lib/docker.ts

@@ -90,7 +90,7 @@ class Docker {
 
     const modem = new Modem();
 
-    return new Promise((resolve, reject) => {
+    return new Promise<void>((resolve, reject) => {
       modem.dial(request, (err, stream: Stream) => {
         if (err) {
           return reject(err);

lib/stream-utils.ts

@@ -42,13 +42,13 @@ async function streamToHash(
   stream: Readable,
   hashAlgorithm: string,
 ): Promise<string> {
-  return new Promise((resolve, reject) => {
+  return new Promise<string>((resolve, reject) => {
     const hash = crypto.createHash(hashAlgorithm);
     hash.setEncoding(HASH_ENCODING);
 
     stream.on("end", () => {
       hash.end();
-      resolve(hash.read());
+      resolve(hash.read().toString(HASH_ENCODING));
     });
 
     stream.on("error", (error) => reject(error));