There is a breaking in change in the `MatcherContext` that is passed to
matcher functions, so we now have `!!this.isNot` in a few places. The
same could happen to custom matcher in the wild.
```ts
// Old
{
isNot: boolean;
promise: string;
}
```
```ts
// New
{
isNot?: boolean;
promise?: string;
}
```
Fixes #23612.
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| .. | ||
| test | ||
| exported.json | ||
| index.js | ||
| overrides-test.d.ts | ||
| overrides-testReporter.d.ts | ||
| overrides.d.ts | ||
| parseOverrides.js | ||