Reduce the package dependencies

[JoshYuJump]

Nowadays the dependencies is too much

decamelize==0.1.2
grpcio==1.32.0
grpcio-tools==1.32.0
GitPython==3.1.11
jinja2==2.11.2
protobuf==3.13.0
protobuf2pydantic==2021.1.20
pydantic==1.7.3
typer==0.3.2

decamelize is included yet in another packages.
jinja2 should be replaced by the python Template in standard library.
pydantic should be replaced to standard library or just removed.
typer should be replace by standard library.