build: allow pyparsing 3.x

AOSC OS currently ships pyparsing v3.2.1 which breaks the original
requirement, and in practice, it does not break anything.
Thus let's accept pyparsing 3.x.

Author: xtexx

setup.py

@@ -38,7 +38,7 @@ def __str__(self):
     url="https://github.com/AOSC-Dev/acbs",
     packages=find_packages(),
     install_requires=[
-        "pyparsing>=2.4,<3"
+        "pyparsing>=2.4,<4"
     ],
     extras_require={
         "Build logging": ["pexpect"]