Upgrade to typescript v4.2.2 (#188)

* upgrade to typescript v4.2.2

* prettier; remove outdated test

contracts/test-utils/package.json

@@ -39,7 +39,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "tslint": "5.11.0",
-        "typescript": "3.0.1"
+        "typescript": "4.2.2"
     },
     "dependencies": {
         "@0x/assert": "^3.0.21",

contracts/test-utils/src/lang_utils.ts

@@ -14,6 +14,6 @@ export function shortZip<T1, T2>(a: T1[], b: T2[]): Array<[T1, T2]> {
 export function replaceKeysDeep(obj: {}, mapKeys: (key: string) => string | void): _.Dictionary<{}> {
     return _.transform(obj, (result, value, key) => {
         const currentKey = mapKeys(key) || key;
-        result[currentKey] = _.isObject(value) ? replaceKeysDeep(value, mapKeys) : value;
+        result[currentKey] = _.isObject(value) ? replaceKeysDeep(value as {}, mapKeys) : (value as {});
     });
 }

contracts/test-utils/src/order_factory.ts

@@ -22,14 +22,14 @@ export class OrderFactory {
     ): Promise<SignedOrder> {
         const fifteenMinutesInSeconds = 15 * 60;
         const currentBlockTimestamp = await getLatestBlockTimestampAsync();
-        const order = ({
+        const order = {
             takerAddress: constants.NULL_ADDRESS,
             senderAddress: constants.NULL_ADDRESS,
             expirationTimeSeconds: new BigNumber(currentBlockTimestamp).plus(fifteenMinutesInSeconds),
             salt: generatePseudoRandomSalt(),
             ...this._defaultOrderParams,
             ...customOrderParams,
-        } as any) as Order;
+        } as Order; // tslint:disable-line:no-object-literal-type-assertion
         const orderHashBuff = orderHashUtils.getOrderHashBuffer(order);
         const signature = signingUtils.signMessage(orderHashBuff, this._privateKey, signatureType);
         const signedOrder = {

contracts/test-utils/src/order_utils.ts

@@ -30,7 +30,8 @@ export const orderUtils = {
         return cancel;
     },
     createOrderWithoutSignature(signedOrder: SignedOrder): Order {
-        return _.omit(signedOrder, ['signature']) as Order;
+        const { signature, ...order } = signedOrder;
+        return order;
     },
     createBatchMatchOrders(signedOrdersLeft: SignedOrder[], signedOrdersRight: SignedOrder[]): BatchMatchOrder {
         return {