build: Add "type" and "exports" to package.json

Update test module paths for "type": "module" in package.json

Author: thewtex

package.json

@@ -3,16 +3,22 @@
   "version": "0.0.2",
   "description": "ZSTD (Zstandard) decoder for Web and Node.js, using WebAssembly",
   "repository": "github:donmccurdy/zstddec",
-  "main": "dist/zstddec.js",
+  "type": "module",
+  "exports": {
+    "types": "dist/zstddec.d.ts",
+    "require": "./dist/zstddec.cjs",
+    "default": "./dist/zstddec.modern.js"
+  },
+  "main": "dist/zstddec.cjs",
   "module": "dist/zstddec.modern.js",
   "source": "zstddec.ts",
   "types": "dist/zstddec.d.ts",
   "scripts": {
     "dist": "microbundle --format modern,cjs",
     "watch": "microbundle watch --format modern,cjs",
     "test": "npm run test:node && npm run test:browser",
-    "test:node": "tape *.test.js | tap-spec",
-    "test:browser": "browserify *.test.js | tape-run | tap-spec",
+    "test:node": "tape *.test.cjs | tap-spec",
+    "test:browser": "browserify *.test.cjs | tape-run | tap-spec",
     "preversion": "npm run dist && npm run test",
     "postversion": "git push && git push --tags && npm publish"
   },