update eth-abi

Author: serderovsh

setup.py

@@ -78,7 +78,7 @@
     "toolz>=0.9.0,<1.0.0;implementation_name=='pypy'",
     "cytoolz>=0.9.0,<1.0.0;implementation_name=='cpython'",
 
-    "eth-abi>=2.0.0b4,<3.0.0",
+    "eth-abi>=2.0.0b5,<3.0.0",
     "eth-account>=0.2.1,<0.4.0",
     "eth-utils>=1.3.0,<2.0.0",