🎉 Add support for Expo SDK 41+ (#28)

* ❌ Get rid of .expo.js extension, no longer supported in Expo SDK 41+

* 🌹 Move getRandomBase64 back into main file

Co-authored-by: Linus Unnebäck <linus@folkdatorn.se>

index.js

@@ -1,5 +1,5 @@
 const base64Decode = require('fast-base64-decode')
-const getRandomBase64 = require('./getRandomBase64')
+const { NativeModules } = require('react-native')
 
 class TypeMismatchError extends Error {}
 class QuotaExceededError extends Error {}
@@ -19,6 +19,20 @@ function insecureRandomValues (array) {
   return array
 }
 
+/**
+ * @param {number} byteLength
+ * @returns {string}
+ */
+function getRandomBase64 (byteLength) {
+  if (NativeModules.RNGetRandomValues) {
+    return NativeModules.RNGetRandomValues.getRandomBase64(byteLength)
+  } else if (NativeModules.ExpoRandom) {
+    return NativeModules.ExpoRandom.getRandomBase64String(byteLength)
+  } else {
+    throw new Error('Native module not found')
+  }
+}
+
 /**
  * @param {Int8Array|Uint8Array|Int16Array|Uint16Array|Int32Array|Uint32Array|Uint8ClampedArray} array
  */