Add TS type for init fn

crates/typescript-tests/run.sh

@@ -11,6 +11,13 @@ cargo run -p wasm-bindgen-cli --bin wasm-bindgen -- \
   --out-dir pkg \
   --typescript
 
+mkdir pkg/web
+cargo run -p wasm-bindgen-cli --bin wasm-bindgen -- \
+  ../../target/wasm32-unknown-unknown/debug/typescript_tests.wasm \
+  --out-dir pkg/web \
+  --target web \
+  --typescript
+
 if [ ! -d node_modules ]; then
   npm install
 fi

crates/typescript-tests/src/web/init.ts

@@ -0,0 +1,3 @@
+import * as wbg from '../../pkg/web/typescript_tests';
+
+const init: Promise<any> = wbg.init('.');

crates/typescript-tests/tsconfig.json

@@ -9,6 +9,6 @@
         "baseUrl": "."
     },
     "include": [
-        "src/*.ts"
+        "src/**/*.ts"
     ]
 }