Supply JSKit runtime in SwiftPM resources

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.2
+// swift-tools-version:5.3
 
 import PackageDescription
 
@@ -12,7 +12,8 @@ let package = Package(
     targets: [
         .target(
             name: "JavaScriptKit",
-            dependencies: ["_CJavaScriptKit"]
+            dependencies: ["_CJavaScriptKit"],
+            resources: [.copy("Runtime")]
         ),
         .target(name: "_CJavaScriptKit"),
         .target(

Runtime/src/closure-heap.ts

@@ -1,4 +1,4 @@
-import { ExportedFunctions } from "./types";
+import { ExportedFunctions } from "./types.js";
 
 /// Memory lifetime of closures in Swift are managed by Swift side
 export class SwiftClosureDeallocator {

Runtime/src/index.ts

@@ -1,14 +1,14 @@
-import { SwiftClosureDeallocator } from "./closure-heap";
+import { SwiftClosureDeallocator } from "./closure-heap.js";
 import {
     LibraryFeatures,
     ExportedFunctions,
     ref,
     pointer,
     TypedArray,
     ImportedFunctions,
-} from "./types";
-import * as JSValue from "./js-value";
-import { Memory } from "./memory";
+} from "./types.js";
+import * as JSValue from "./js-value.js";
+import { Memory } from "./memory.js";
 
 export class SwiftRuntime {
     private _instance: WebAssembly.Instance | null;

Runtime/src/js-value.ts

@@ -1,5 +1,5 @@
-import { Memory } from "./memory";
-import { assertNever, pointer } from "./types";
+import { Memory } from "./memory.js";
+import { assertNever, pointer } from "./types.js";
 
 export const enum Kind {
     Boolean = 0,

Runtime/src/memory.ts

@@ -1,5 +1,5 @@
-import { SwiftRuntimeHeap } from "./object-heap";
-import { pointer } from "./types";
+import { SwiftRuntimeHeap } from "./object-heap.js";
+import { pointer } from "./types.js";
 
 export class Memory {
     readonly rawMemory: WebAssembly.Memory;

Runtime/src/object-heap.ts

@@ -1,5 +1,5 @@
-import { globalVariable } from "./find-global";
-import { ref } from "./types";
+import { globalVariable } from "./find-global.js";
+import { ref } from "./types.js";
 
 type SwiftRuntimeHeapEntry = {
     id: number;

Runtime/src/types.ts

@@ -1,4 +1,4 @@
-import * as JSValue from "./js-value";
+import * as JSValue from "./js-value.js";
 
 export type ref = number;
 export type pointer = number;