python3: decode to utf8

Part of #20

Co-authored-by: Alexander Turenko <[email protected]>

lib/inspector.py

@@ -1,4 +1,5 @@
 import os
+import sys
 import yaml
 import traceback
 
@@ -74,6 +75,8 @@ def readline(socket, delimiter='\n', size=4096):
         while data:
             try:
                 data = socket.recv(size)
+                if sys.version_info[0] == 3:
+                    data = data.decode('utf-8')
             except IOError:
                 # catch instance halt connection refused errors
                 data = ''