Add jsonschema to requirements

Author: terriko

setup.py

@@ -34,6 +34,7 @@
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],
+    install_requires=["jsonschema"],
     packages=find_packages(),
     entry_points={
         "console_scripts": ["cve-bin-tool = cve_bin_tool.cli:main"],