feat(@nestjs/common): update validation condition

This commit also removes the unused rxjs import

Author: oschweitzer

src/common/pipes/parse-int.pipe.ts

@@ -1,12 +1,11 @@
-import { BadRequestException } from '../exceptions/bad-request.exception';
-import { PipeTransform } from '../interfaces/pipe-transform.interface';
-import { Pipe, ArgumentMetadata } from '../index';
-import {isNumeric} from "rxjs/util/isNumeric";
+import {BadRequestException} from '../exceptions/bad-request.exception';
+import {PipeTransform} from '../interfaces/pipe-transform.interface';
+import {ArgumentMetadata, Pipe} from '../index';
 
 @Pipe()
 export class ParseIntPipe implements PipeTransform<string> {
   async transform(value: string, metadata: ArgumentMetadata): Promise<number> {
-    if ('string' === typeof value && isNumeric(value)) {
+    if ('string' === typeof value && !isNaN(parseFloat(value)) && isFinite(value as any)) {
      return parseInt(value, 10);
     }
     else {