Add support for passing the model programmatically

[kibertoad]

fixes #2

(this seems not to work, fixing now)

[codecov-io]

Codecov Report

Merging #3 (f002cfc) into master (4ed0ad1) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master        #3   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           14        14           
=========================================
  Hits            14        14           

Impacted Files	Coverage Δ
plugin.js	100.00% <100.00%> (ø)

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[kibertoad]

@simoneb Do you think it makes sense to narrow down possible type for enforcerParam? casbin types are not very helpful here, they define params as any[]

[kibertoad]

Having thought about it more, semver major approach seems more elegant and less complex.

[simoneb]

LGTM. this will require a major semver bump as modelPath is replaced by model. the change makes sense to me anyway, modelPath was misleading

[simoneb]

@simoneb Do you think it makes sense to narrow down possible type for enforcerParam? casbin types are not very helpful here, they define params as any[]

yeah they're defined like that because there's quite a bit of logic that they apply to the arguments provided to newEnforcer, see https://github.com/casbin/node-casbin/blob/master/src/enforcer.ts#L356.

nevertheless, I like the slightly more typed way we do it here, which gives some guidance about how to do it while still keeping lots of the flexibility

[kibertoad]

@simoneb Should I do the version bump or you'll do that during the release process?

[simoneb]

@simoneb Should I do the version bump or you'll do that during the release process?

I'll bump before release, thanks