Input: correct the sequence parser

Correct the sequence parser to handle the parameter separator in the CSI
sequence. The ASCII byte for the separator was incorrect and was adding
an additional parameter (`0`).

Author: compnerd

Sources/VirtualTerminal/Input/VTInputParser.swift

@@ -302,8 +302,8 @@ extension VTInputParser {
       input = buffer
       return parse(next: &input)
 
-    case 0x38: // ';' (Parameter Separator)
-      state = .CSI(parameters: parameters + [0], intermediate: intermediate)
+    case 0x3b: // ';' (Parameter Separator)
+      state = .CSI(parameters: parameters, intermediate: intermediate)
       input = input.dropFirst()
       return parse(next: &input)