fix: update jsr export field

Author: thedanchez

jsr.json

@@ -2,7 +2,7 @@
   "name": "@dschz/solid-lightweight-charts",
   "version": "0.4.0",
   "license": "MIT",
-  "exports": "./src/index.tsx",
+  "exports": "./src/index.ts",
   "publish": {
     "include": ["LICENSE", "README.md", "CHANGELOG.md", "src/**/*.tsx", "src/**/*.ts"],
     "exclude": ["**/*.test.tsx", "**/*.test.ts"]