chore: Updates extism pdk based on last readme

Author: thecodedrift

.github/workflows/tests.yml

@@ -52,5 +52,8 @@ jobs:
       - name: List out the dist dir (sanity check)
         run: ls -la dist
 
+      - name: Check extism install
+        run: extism-js --version
+
       - name: Run Test Suite
         run: pnpm test

src/index.d.ts

@@ -5,3 +5,7 @@ declare module "main" {
   export function pre(): I32;
   export function post(): I32;
 }
+
+declare module "extism:host" {
+  // no host functions to load
+}