use relative imports in miniflare core (#664)

Author: ajwootto

packages/core/src/standards/crypto.ts

@@ -1,6 +1,6 @@
 import { createHash, timingSafeEqual, webcrypto } from "crypto";
 import { WritableStream } from "stream/web";
-import { DOMException } from "@miniflare/core";
+import { DOMException } from "./domexception";
 import { viewToBuffer } from "@miniflare/shared";
 import {
   assertsInRequest,

packages/core/src/standards/encoding.ts

@@ -1,4 +1,4 @@
-import { DOMException } from "@miniflare/core";
+import { DOMException } from "./domexception";
 
 // Implementations of base64 functions adapted from Node.js:
 // https://github.com/nodejs/node/blob/1086468aa3d328d2eac00bf66058906553ecd209/lib/buffer.js#L1213-L1239

packages/core/src/standards/timers.ts

@@ -1,4 +1,4 @@
-import { DOMException } from "@miniflare/core";
+import { DOMException } from "./domexception";
 import { assertInRequest, waitForOpenInputGate } from "@miniflare/shared";
 
 export type TimerFunction<Return> = <Args extends any[]>(