Upgrade to TypeScript 3.9 (#1267)

Author: sindresorhus

package.json

@@ -10,7 +10,7 @@
 		"node": ">=10.19.0"
 	},
 	"scripts": {
-		"test": "xo && tsc --noEmit && nyc --reporter=html --reporter=text ava",
+		"test": "xo && npm run build && nyc --reporter=html --reporter=text ava",
 		"release": "np",
 		"build": "del-cli dist && tsc",
 		"prepare": "npm run build"
@@ -61,7 +61,7 @@
 		"@sinonjs/fake-timers": "^6.0.1",
 		"@types/benchmark": "^1.0.31",
 		"@types/express": "^4.17.6",
-		"@types/node": "^13.13.4",
+		"@types/node": "^14.0.11",
 		"@types/node-fetch": "^2.5.5",
 		"@types/request": "^2.48.4",
 		"@types/sinon": "^9.0.0",
@@ -86,7 +86,7 @@
 		"tempy": "^0.5.0",
 		"to-readable-stream": "^2.1.0",
 		"tough-cookie": "^4.0.0",
-		"typescript": "3.8.3",
+		"typescript": "3.9.6",
 		"xo": "^0.30.0"
 	},
 	"types": "dist/source",

source/as-promise/core.ts

@@ -22,7 +22,7 @@ if (!knownHookEvents.includes('beforeRetry' as any)) {
 export const knownBodyTypes = ['json', 'buffer', 'text'];
 
 // @ts-ignore The error is: Not all code paths return a value.
-export const parseBody = (response: Response, responseType: ResponseType, parseJson: ParseJsonFunction, encoding?: string): unknown => {
+export const parseBody = (response: Response, responseType: ResponseType, parseJson: ParseJsonFunction, encoding?: BufferEncoding): unknown => {
 	const {rawBody} = response;
 
 	try {

source/core/index.ts

@@ -1338,7 +1338,7 @@ export default class Request extends Duplex implements RequestEvents<Request> {
 			this._unlockWrite();
 
 			if (!is.undefined(body)) {
-				this._writeRequest(body, null as unknown as string, () => {});
+				this._writeRequest(body, undefined, () => {});
 				currentRequest.end();
 
 				this._lockWrite();
@@ -1604,7 +1604,7 @@ export default class Request extends Duplex implements RequestEvents<Request> {
 		}
 	}
 
-	_write(chunk: any, encoding: string, callback: (error?: Error | null) => void): void {
+	_write(chunk: any, encoding: BufferEncoding | undefined, callback: (error?: Error | null) => void): void {
 		const write = (): void => {
 			this._writeRequest(chunk, encoding, callback);
 		};
@@ -1616,9 +1616,9 @@ export default class Request extends Duplex implements RequestEvents<Request> {
 		}
 	}
 
-	_writeRequest(chunk: any, encoding: string, callback: (error?: Error | null) => void): void {
+	_writeRequest(chunk: any, encoding: BufferEncoding | undefined, callback: (error?: Error | null) => void): void {
 		this._progressCallbacks.push((): void => {
-			this[kUploadedSize] += Buffer.byteLength(chunk, encoding as BufferEncoding);
+			this[kUploadedSize] += Buffer.byteLength(chunk, encoding);
 
 			const progress = this.uploadProgress;
 
@@ -1629,7 +1629,7 @@ export default class Request extends Duplex implements RequestEvents<Request> {
 
 		// TODO: What happens if it's from cache? Then this[kRequest] won't be defined.
 
-		this[kRequest]!.write(chunk, encoding, (error?: Error | null) => {
+		this[kRequest]!.write(chunk, encoding!, (error?: Error | null) => {
 			if (!error && this._progressCallbacks.length !== 0) {
 				this._progressCallbacks.shift()!();
 			}

source/create.ts

@@ -120,14 +120,14 @@ const create = (defaults: InstanceDefaults): Got => {
 			) as GotReturn;
 		};
 
-		// TODO: remove this in Got 12
+		// TODO: Remove this in Got 12.
 		if (is.plainObject(url)) {
 			const mergedOptions = {
 				...url as Options,
 				...options
 			};
 
-			setNonEnumerableProperties([url, options], mergedOptions);
+			setNonEnumerableProperties([url as Options, options], mergedOptions);
 
 			options = mergedOptions;
 			url = undefined as any;
@@ -197,6 +197,9 @@ const create = (defaults: InstanceDefaults): Got => {
 
 	// Pagination
 	const paginateEach = (async function * <T, R>(url: string | URL, options?: OptionsWithPagination<T, R>) {
+		// TODO: Remove this `@ts-expect-error` when upgrading to TypeScript 4.
+		// Error: Argument of type 'Merge<Options, PaginationOptions<T, R>> | undefined' is not assignable to parameter of type 'Options | undefined'.
+		// @ts-expect-error
 		let normalizedOptions = normalizeArguments(url, options, defaults.options);
 		normalizedOptions.resolveBodyOnly = false;
 

source/index.ts

@@ -125,6 +125,7 @@ export default got;
 // For CommonJS default export support
 module.exports = got;
 module.exports.default = got;
+module.exports.__esModule = true; // Workaround for TS issue: https://github.com/sindresorhus/got/pull/1267
 
 export * from './create';
 export * from './as-promise';