build(web): mark @types/emscripten as a dev dep

lib/binding_web/package-lock.json

@@ -10,6 +10,7 @@
       "license": "MIT",
       "devDependencies": {
         "@eslint/js": "^9.20.0",
+        "@types/emscripten": "^1.40.0",
         "@types/node": "^24.3.0",
         "@vitest/coverage-v8": "^3.0.5",
         "dts-buddy": "^0.6.2",
@@ -20,14 +21,6 @@
         "typescript": "^5.7.3",
         "typescript-eslint": "^8.23.0",
         "vitest": "^3.0.5"
-      },
-      "peerDependencies": {
-        "@types/emscripten": "^1.40.0"
-      },
-      "peerDependenciesMeta": {
-        "@types/emscripten": {
-          "optional": true
-        }
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -1195,9 +1188,8 @@
       "version": "1.40.0",
       "resolved": "https://registry.npmjs.org/@types/emscripten/-/emscripten-1.40.0.tgz",
       "integrity": "sha512-MD2JJ25S4tnjnhjWyalMS6K6p0h+zQV6+Ylm+aGbiS8tSn/aHLSGNzBgduj6FB4zH0ax2GRMGYi/8G1uOxhXWA==",
-      "license": "MIT",
-      "optional": true,
-      "peer": true
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@types/estree": {
       "version": "1.0.8",

lib/binding_web/package.json

@@ -70,6 +70,7 @@
   ],
   "devDependencies": {
     "@eslint/js": "^9.20.0",
+    "@types/emscripten": "^1.40.0",
     "@types/node": "^24.3.0",
     "@vitest/coverage-v8": "^3.0.5",
     "dts-buddy": "^0.6.2",
@@ -81,14 +82,6 @@
     "typescript-eslint": "^8.23.0",
     "vitest": "^3.0.5"
   },
-  "peerDependencies": {
-    "@types/emscripten": "^1.40.0"
-  },
-  "peerDependenciesMeta": {
-    "@types/emscripten": {
-      "optional": true
-    }
-  },
   "scripts": {
     "build:ts": "tsc -b . && node script/build.js",
     "build:wasm": "cd ../../ && cargo xtask build-wasm",