pip install frida-tools fails on up-to-date macOS (prompt-toolkit requirements)

首先，在使用 Python 2.7 的 macOS Catalina 上重现报告的 pip install frida-tools 失败，然后检查 frida-tools 的打包元数据及其对 prompt-toolkit 的要求。当依赖解析失败已通过安装命令修复并验证，或其兼容性限制已得到明确记录时，即视为完成。

Not sure if I'm missing something obvious but the pip install won't work for me (Catalina 10.15.3).

▶ pip install frida-tools
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Collecting frida-tools
  Using cached https://files.pythonhosted.org/packages/ba/07/baa9124b365d69d3e9e0e099dc996f4a7fb7d66e01327a70133cb5d64373/frida-tools-7.2.0.tar.gz
Requirement already satisfied: colorama<1.0.0,>=0.2.7 in /usr/local/lib/python2.7/site-packages (from frida-tools) (0.4.1)
Collecting frida<13.0.0,>=12.8.12
  Using cached https://files.pythonhosted.org/packages/0a/4b/b191420bd34215377f72e04593619d9266d5e3e33f6cf48c8e827dcecb89/frida-12.8.20.tar.gz
ERROR: Could not find a version that satisfies the requirement prompt-toolkit<4.0.0,>=3.0.3 (from frida-tools) (from versions: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.25, 0.26, 0.28, 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.0.10, 1.0.13, 1.0.14, 1.0.15, 1.0.16, 1.0.17, 1.0.18, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10)
ERROR: No matching distribution found for prompt-toolkit<4.0.0,>=3.0.3 (from frida-tools)