Fix broken CLI when we add new API versions

[Yannicked]

The CLI previously selected the latest API version advertised by the server (even when it's unsupported by the client), so deploying a new API version would immediately switch all existing clients onto it (and break them).

This PR will select the highest version supported by both sides.

[olivhoenen]

Looks fine to me, but as discussed with @prasad-sawantdesai and in #103, we will need to explicitly tell about API versioning rules in the dev documentation.

[Yannicked]

Add decorators to API calls in client

[Yannicked]

@prasad-sawantdesai Using this PR in #70 you could add

@versioned_method('v1.3')
@try_request
def get_simulation_data(...)

and update the CLIENT_API_VERSIONS = ("v1.2",) to CLIENT_API_VERSIONS = ("v1.2","v1.3")

[prasad-sawantdesai]

@prasad-sawantdesai Using this PR in #70 you could add

@versioned_method('v1.3')
@try_request
def get_simulation_data(...)

and update the CLIENT_API_VERSIONS = ("v1.2",) to CLIENT_API_VERSIONS = ("v1.2","v1.3")

Thanks. Updated #70

[prasad-sawantdesai]

@Yannicked Do you understand why it failed? #70

$ simdb remote pr-70 test
Error: 'get_api_version' is not supported by the negotiated API version 'v1.3'. It requires one of: v1.2.

simdb.cfg

[remote "pr-70"]
url = http://10.154.84.240:5101/
default = True

[prasad-sawantdesai]

@Yannicked Do you understand why it failed? #70

$ simdb remote pr-70 test
Error: 'get_api_version' is not supported by the negotiated API version 'v1.3'. It requires one of: v1.2.

simdb.cfg

[remote "pr-70"]
url = http://10.154.84.240:5101/
default = True

It worked with these changes 8964e06
aligned with #83
Thanks

$ simdb remote pr-70 test
Remote is valid (remote API version: 1.3)