Fix type definitions for moduleResolution nodenext

When importing this library in a project using moduleResolution
nodenext, the types would give errors because the import paths were
missing the file extension which is required for moduleResolution
nodenext. Therefore we have to add .js to all imports of local files.

See developit/microbundle#1019 (comment)
and the issues that comment links to for some more detailed explanation
of this.

I also changed moduleResolution to nodenext in the tsconfig because when
it's set to node, typescript won't give errors for missing file
extensions which means they are easy to forget. With it set to nodenext,
you will get an error if an import is missing the file extension. As far
as I can see, changing this doesn't change the build output.

package.json

@@ -9,6 +9,7 @@
   "main": "./dist/ktx-parse.cjs",
   "module": "./dist/ktx-parse.esm.js",
   "exports": {
+    "types": "./dist/index.d.ts",
     "require": "./dist/ktx-parse.cjs",
     "default": "./dist/ktx-parse.modern.js"
   },

src/container.ts

@@ -8,7 +8,7 @@ import {
 	KHR_DF_VERSION,
 	KHR_SUPERCOMPRESSION_NONE,
 	VK_FORMAT_UNDEFINED,
-} from './constants';
+} from './constants.js';
 
 /**
  * Represents an unpacked KTX 2.0 texture container. Data for individual mip levels are stored in

src/index.ts

@@ -1,4 +1,4 @@
-export * from './container';
-export * from './constants';
-export * from './read';
-export * from './write';
+export * from './container.js';
+export * from './constants.js';
+export * from './read.js';
+export * from './write.js';

src/read.ts

@@ -1,8 +1,8 @@
-import { BufferReader } from './buffer-reader';
-import { KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants';
-import { KTX2_ID } from './constants-internal';
-import { KTX2Container, KTX2DataFormatDescriptorBasicFormat } from './container';
-import { decodeText } from './util';
+import { BufferReader } from './buffer-reader.js';
+import { KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants.js';
+import { KTX2_ID } from './constants-internal.js';
+import { KTX2Container, KTX2DataFormatDescriptorBasicFormat } from './container.js';
+import { decodeText } from './util.js';
 
 /**
  * Parses a KTX 2.0 file, returning an unpacked {@link KTX2Container} instance with all associated

src/write.ts

@@ -1,7 +1,7 @@
-import { HEADER_BYTE_LENGTH, KTX2_ID, KTX_WRITER, NUL } from './constants-internal';
-import { KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT, KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants';
-import { KTX2Container } from './container';
-import { concat, encodeText } from './util';
+import { HEADER_BYTE_LENGTH, KTX2_ID, KTX_WRITER, NUL } from './constants-internal.js';
+import { KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT, KHR_DF_SAMPLE_DATATYPE_SIGNED } from './constants.js';
+import { KTX2Container } from './container.js';
+import { concat, encodeText } from './util.js';
 
 interface WriteOptions {
 	keepWriter?: boolean;

tsconfig.json

@@ -3,7 +3,7 @@
     "paths": {
       "ktx-parse": ["./"]
     },
-    "moduleResolution": "node",
+    "moduleResolution": "nodenext",
     "lib": ["es2020", "dom"],
     "target": "es2020",
     "module": "es2020",