v1.9.4: fixed case typo (didn't affect tests on my mac)

lib/rsa.js

@@ -13,7 +13,7 @@ try {
   /* ignore */
 }
 
-var Keypairs = require('Keypairs');
+var Keypairs = require('keypairs');
 var RSACSR = require('./rsa-csr');
 var NOBJ = {};
 var DEFAULT_BITLEN = 2048;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rsa-compat",
-  "version": "1.9.3",
+  "version": "1.9.4",
   "engines": {
     "node": ">=10.12"
   },