Composer: bump mininum required version of phpseclib

Author: terrafrost

composer.json

@@ -23,7 +23,7 @@
     },
     "require": {
         "php": ">=5.6.1",
-        "phpseclib/phpseclib": ">=3.0.13 <4.0.0"
+        "phpseclib/phpseclib": ">=3.0.34 <4.0.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7|^6.0|^9.4"