errors: use color wrapper

This allows the program to work without termcolor installed

compiler/errors.py

@@ -5,16 +5,14 @@ import inspect
 import sys
 from typing import TextIO
 
-from termcolor import termcolor
+from . import source, lexer, color
-
-from . import source, lexer
 from .logger import rootLogger, LogLevel
 from .source import TextIOWithMemory
 
 
 class LevelType:
 
-    def __init__(self, name: str, color: termcolor.Color = None):
+    def __init__(self, name: str, color: color.Color = None):
         """
 
         :param name:
@@ -27,7 +25,7 @@ class LevelType:
         return self.show_with_suffix()
 
     def show_with_suffix(self, suffix=":") -> str:
-        return termcolor.colored(f"{self.name}{suffix}", color=self.color, attrs=["bold"])
+        return color.colored(f"{self.name}{suffix}", color=self.color, attrs=["bold"])
 
 
 class Levels(enum.Enum):