Improve error types

Author: jdesrosiers

annotations/index.d.ts

@@ -15,7 +15,7 @@ export type Annotator = (value: Json, options?: OutputFormat | ValidationOptions
 export const interpret: (compiledSchema: CompiledSchema, value: JsonNode, options?: OutputFormat | ValidationOptions) => JsonNode;
 
 export class ValidationError extends Error {
-  public output: Output;
+  public output: Output & { valid: false };
 
   public constructor(output: Output);
 }

lib/index.d.ts

@@ -56,7 +56,7 @@ export const setShouldValidateSchema: (isEnabled: boolean) => void;
 export const getShouldValidateSchema: () => boolean;
 
 export class InvalidSchemaError extends Error {
-  public output: Output;
+  public output: Output & { valid: false };
 
   public constructor(output: Output);
 }