Refactor: fastApi example requirements.txt (#24)

Refactor: fastApi example requirements.txt

examples/fastapi/requirements.txt

@@ -1,18 +1,16 @@
 moesifasgi
 uvicorn
-passlib==1.7.4
-moesifapi==1.4.2
-moesifpythonrequest==0.3.3
-fastapi==0.108.0
-jose==1.0.0
-python-jose==3.3.0
-rsa==4.8
-ecdsa==0.17.0
-pyasn1==0.4.8
-cryptography==37.0.2
-cffi==1.15.0
-six==1.16.0
-pycparser==2.21
+passlib>=1.7.4
+fastapi>=0.108.0
+jose>=1.0.0
+python-jose>=3.3.0
+rsa>=4.8
+ecdsa>=0.17.0
+pyasn1>=0.4.8
+cryptography>=37.0.2
+cffi>=1.15.0
+six>=1.16.0
+pycparser>=2.21
 bcrypt
 python-multipart
 importlib-metadata