fix(TS): findBy* typings: Remove Error as a possible return value (#239)

* Remove Error as a possible return value since errors are thrown

* docs: fix a typo to kick the codecov build

Author: bopfer

README.md

@@ -65,7 +65,7 @@ your team down.
 
 The `dom-testing-library` is a very light-weight solution for testing DOM nodes
 (whether simulated with [`JSDOM`](https://github.com/jsdom/jsdom) as provided by
-default with [jest][] or in the browser). The main utilities it provides involve
+default with [Jest][] or in the browser). The main utilities it provides involve
 querying the DOM for nodes in a way that's similar to how the user finds
 elements on the page. In this way, the library helps ensure your tests give you
 confidence in your UI code. The `dom-testing-library`'s primary guiding

typings/queries.d.ts

@@ -19,7 +19,7 @@ export type FindAllByBoundAttribute = (
   id: Matcher,
   options?: MatcherOptions,
   waitForElementOptions?: WaitForElementOptions
-) => Promise<HTMLElement[]> | Error
+) => Promise<HTMLElement[]>
 
 export type GetByBoundAttribute = (
   container: HTMLElement,
@@ -32,7 +32,7 @@ export type FindByBoundAttribute = (
   id: Matcher,
   options?: MatcherOptions,
   waitForElementOptions?: WaitForElementOptions
-) => Promise<HTMLElement> | Error
+) => Promise<HTMLElement>
 
 export type QueryByText = (
   container: HTMLElement,
@@ -51,7 +51,7 @@ export type FindAllByText = (
   id: Matcher,
   options?: SelectorMatcherOptions,
   waitForElementOptions?: WaitForElementOptions
-) => Promise<HTMLElement[]> | Error
+) => Promise<HTMLElement[]>
 
 export type GetByText = (
   container: HTMLElement,
@@ -64,7 +64,7 @@ export type FindByText = (
   id: Matcher,
   options?: SelectorMatcherOptions,
   waitForElementOptions?: WaitForElementOptions
-) => Promise<HTMLElement> | Error
+) => Promise<HTMLElement>
 
 export const getByLabelText: GetByText
 export const getAllByLabelText: AllByText