bcdatastream as external package

Author: andkom

composer.json

@@ -16,7 +16,8 @@
   "require": {
     "php": "^7.1",
     "bitwasp/bitcoin": "~0.0.34",
-    "andkom/php-berkeley-db": "^1.0.0"
+    "andkom/php-berkeley-db": "^1.0.0",
+    "andkom/bcdatastream": "^1.0"
   },
   "require-dev": {
     "phpunit/phpunit": ">=5.0"