Require exact version matches in qsharp metapackage. (#468)

Python/qsharp-chemistry/setup.py

@@ -61,6 +61,6 @@ setuptools.setup(
         "Operating System :: OS Independent",
     ],
     install_requires=[
-        'qsharp-core'
+        f'qsharp-core=={version}'
     ]
 )

Python/qsharp/setup.py

@@ -48,7 +48,7 @@ setuptools.setup(
         "Operating System :: OS Independent",
     ],
     install_requires=[
-        'qsharp-core',
-        'qsharp-chemistry'
+        f'qsharp-core=={version}',
+        f'qsharp-chemistry=={version}'
     ]
 )