Hardcode Ronin::Support::Binary::Unhexdump::Parser::VISIBLE_CHARS.

* This helps workaround a bug in `chars` on Ruby 4.0.0.
* This has the added benefit of improving load times.

Author: postmodern

lib/ronin/support/binary/unhexdump/parser.rb

@@ -18,8 +18,6 @@
 
 require 'ronin/support/binary/ctypes'
 
-require 'chars'
-
 module Ronin
   module Support
     module Binary
@@ -46,7 +44,102 @@ class Parser
           )
 
           # Visible characters
-          VISIBLE_CHARS = Chars::VISIBLE.chars.sort.zip(Chars::VISIBLE.bytes.sort).to_h
+          VISIBLE_CHARS = {
+            "!" => 33,
+            "\"" => 34,
+            "#" => 35,
+            "$" => 36,
+            "%" => 37,
+            "&" => 38,
+            "'" => 39,
+            "(" => 40,
+            ")" => 41,
+            "*" => 42,
+            "+" => 43,
+            "," => 44,
+            "-" => 45,
+            "." => 46,
+            "/" => 47,
+            "0" => 48,
+            "1" => 49,
+            "2" => 50,
+            "3" => 51,
+            "4" => 52,
+            "5" => 53,
+            "6" => 54,
+            "7" => 55,
+            "8" => 56,
+            "9" => 57,
+            ":" => 58,
+            ";" => 59,
+            "<" => 60,
+            "=" => 61,
+            ">" => 62,
+            "?" => 63,
+            "@" => 64,
+            "A" => 65,
+            "B" => 66,
+            "C" => 67,
+            "D" => 68,
+            "E" => 69,
+            "F" => 70,
+            "G" => 71,
+            "H" => 72,
+            "I" => 73,
+            "J" => 74,
+            "K" => 75,
+            "L" => 76,
+            "M" => 77,
+            "N" => 78,
+            "O" => 79,
+            "P" => 80,
+            "Q" => 81,
+            "R" => 82,
+            "S" => 83,
+            "T" => 84,
+            "U" => 85,
+            "V" => 86,
+            "W" => 87,
+            "X" => 88,
+            "Y" => 89,
+            "Z" => 90,
+            "[" => 91,
+            "\\" => 92,
+            "]" => 93,
+            "^" => 94,
+            "_" => 95,
+            "`" => 96,
+            "a" => 97,
+            "b" => 98,
+            "c" => 99,
+            "d" => 100,
+            "e" => 101,
+            "f" => 102,
+            "g" => 103,
+            "h" => 104,
+            "i" => 105,
+            "j" => 106,
+            "k" => 107,
+            "l" => 108,
+            "m" => 109,
+            "n" => 110,
+            "o" => 111,
+            "p" => 112,
+            "q" => 113,
+            "r" => 114,
+            "s" => 115,
+            "t" => 116,
+            "u" => 117,
+            "v" => 118,
+            "w" => 119,
+            "x" => 120,
+            "y" => 121,
+            "z" => 122,
+            "{" => 123,
+            "|" => 124,
+            "}" => 125,
+            "~" => 126
+          }
 
           # Escaped characters
           CHARS = {