use stand-alone `results` library

It hasn't been part of `stew` for a good while now - also fix version
number in nimble file.

bindings/nim/kzg.nim

@@ -4,7 +4,8 @@
 
 import
   std/[streams, strutils],
-  stew/[results, byteutils],
+  stew/byteutils,
+  results,
   ./kzg_abi
 
 export

bindings/nim/kzg_ex.nim

@@ -3,7 +3,7 @@
 ############################################################
 
 import
-  stew/results,
+  results,
   ./kzg
 
 export

kzg4844.nimble

@@ -5,7 +5,7 @@ mode = ScriptMode.Verbose
 ##################################################
 
 packageName   = "kzg4844"
-version       = "0.1.0"
+version       = "1.0.1"
 author        = "Andri Lim"
 description   = "Nim wrapper of c-kzg-4844"
 license       = "Apache License 2.0"
@@ -24,7 +24,8 @@ installDirs   = @[
   "bindings/nim"
   ]
 
-requires "nim >= 1.2.0",
+requires "nim >= 1.6.0",
+         "results",
          "stew"
 
 ##################################################