fix(isHashMatch): check that hash starts with $

Previously, we used argon2 to verify the hash with the password.

If the hash didn't start with a $, then it would enter the catch block.

Now we check the hash before trying to verify it and we also throw an Error if
the verify fails.

This makes the isHashMatch function more robust.

test/unit/node/util.test.ts

@@ -189,6 +189,17 @@ describe("isHashMatch", () => {
     const actual = await util.isHashMatch(password, _hash)
     expect(actual).toBe(false)
   })
+  it("should return false and not throw an error if the hash doesn't start with a $", async () => {
+    const password = "hellowpasssword"
+    const _hash = "n2i$v=19$m=4096,t=3,p=1$EAoczTxVki21JDfIZpTUxg$rkXgyrW4RDGoDYrxBFD4H2DlSMEhP4h+Api1hXnGnFY"
+    expect(async () => await util.isHashMatch(password, _hash)).not.toThrow()
+    expect(await util.isHashMatch(password, _hash)).toBe(false)
+  })
+  it("should reject the promise and throw if error", async () => {
+    const password = "hellowpasssword"
+    const _hash = "$ar2i"
+    expect(async () => await util.isHashMatch(password, _hash)).rejects.toThrow()
+  })
 })
 
 describe("hashLegacy", () => {