feat!: use named exports to expose different hashers (#459)

* Use named exports to expose hashers

* Add types reference for named exports

packages/persistent-merkle-tree/package.json

@@ -3,8 +3,33 @@
   "version": "0.9.1",
   "description": "Merkle tree implemented as a persistent datastructure",
   "type": "module",
-  "main": "./lib/index.js",
-  "types": "./lib/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./lib/index.js",
+      "types": "./lib/index.d.ts"
+    },
+    "./hashtree": {
+      "import": "./lib/hasher/hashtree.js",
+      "types": "./lib/hasher/hashtree.d.ts"
+    },
+    "./noble": {
+      "import": "./lib/hasher/noble.js",
+      "types": "./lib/hasher/noble.d.ts"
+    },
+    "./as-sha256": {
+      "import": "./lib/hasher/as-sha256.js",
+      "types": "./lib/hasher/as-sha256.d.ts"
+    }
+  },
+  "typesVersions": {
+    "*": {
+      "*": [
+        "*",
+        "lib/*",
+        "lib/*/index"
+      ]
+    }
+  },
   "files": [
     "lib"
   ],

setHasher.mjs

@@ -1,7 +1,7 @@
 // Set the hasher to hashtree
 // Used to run benchmarks with with visibility into hashtree performance, useful for Lodestar
-import {setHasher} from "@chainsafe/persistent-merkle-tree/lib/hasher/index.js";
-import {hasher} from "@chainsafe/persistent-merkle-tree/lib/hasher/hashtree.js";
+import {setHasher} from "@chainsafe/persistent-merkle-tree";
+import {hasher} from "@chainsafe/persistent-merkle-tree/hashtree";
 setHasher(hasher);
 
 export {};