Don't use node -e require for npm installer

npm/install.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+const { install } = require("./binary");
+install();

npm/package.json

@@ -4,8 +4,8 @@
   "description": "📦✨ your favorite rust -> wasm workflow tool!",
   "main": "binary.js",
   "scripts": {
-    "postinstall": "node -e 'require(\"./binary.js\").install()'",
-    "preuninstall": "node -e 'require(\"./binary.js\").uninstall()'"
+    "postinstall": "node ./install.js",
+    "preuninstall": "node ./uninstall.js"
   },
   "bin": {
     "wasm-pack": "./run.js"

npm/run.js

@@ -1,4 +1,4 @@
 #!/usr/bin/env node
 
 const { run } = require("./binary");
-run()
+run();

npm/uninstall.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+const { uninstall } = require("./binary");
+uninstall();