chore(deps): update dependency expect-type to v0.20.0

##### [`v0.20.0](https://github.com/mmkal/expect-type/releases/tag/v0.20.0)

#### Breaking changes

-   improve overloads support, attempt 2 by [@mmkal](https://github.com/mmkal) in mmkal/expect-type#83

This change updates how overloaded functions are treated. Now, `.parameters` gives you a *union* of the parameter-tuples that a function can take. For example, given the following type:

```ts
type Factorize = {
  (input: number): number[]
  (input: bigint): bigint[]
}
```

Behvaiour before:

```ts
expectTypeOf<Factorize>().parameters.toEqualTypeOf<[bigint]>()
```

Behaviour now:

```ts
expectTypeOf<Factorize>().parameters.toEqualTypeOf<[number] | [bigint]>()
```

There were similar changes for `.returns`, `.parameter(...)`, and `.toBeCallableWith`. Also, overloaded functions are now differentiated properly when using `.branded.toEqualTypeOf` (this was a bug that it seems nobody found).

See [#83](mmkal/expect-type#83) for more details or look at the updated docs (including a new section called "[Overloaded functions](https://github.com/mmkal/expect-type#overloaded-functions)", which has more info on how this behaviour differs for TypeScript versions before 5.3).

#### What's Changed

-   Fix rendering issue in readme by [@mrazauskas](https://github.com/mrazauskas) in mmkal/expect-type#69
-   Fix minor issues in docs by [@aryaemami59](https://github.com/aryaemami59) in mmkal/expect-type#91
-   create utils file by [@mmkal](https://github.com/mmkal) in mmkal/expect-type#93
-   branding.ts and messages.ts by [@mmkal](https://github.com/mmkal) in mmkal/expect-type#95
-   improve overloads support, attempt 2 by [@mmkal](https://github.com/mmkal) in mmkal/expect-type#83
-   Extends: explain myself  [`1e37116`](mmkal/expect-type@1e37116)
-   Mark internal APIs with `@internal` JSDoc tag ([#104](mmkal/expect-type#104))  [`4c40b07`](mmkal/expect-type@4c40b07)
-   Re-export everything in `overloads.ts` file ([#107](mmkal/expect-type#107))  [`5ee0181`](mmkal/expect-type@5ee0181)
-   JSDoc improvements ([#100](mmkal/expect-type#100))  [`0bbeffa`](mmkal/expect-type@0bbeffa)

**Full Changelog**: mmkal/expect-type@v0.19.0...v0.20.0

package.json

@@ -49,7 +49,7 @@
     "@types/node": "20.16.1",
     "eslint-plugin-mmkal": "0.9.0",
     "execa": "9.3.1",
-    "expect-type": "0.19.0",
+    "expect-type": "0.20.0",
     "fs-syncer": "0.5.3",
     "np": "10.0.7",
     "pkg-pr-new": "^0.0.20",