expose span options

[eli-jordan]

Fixes #93

The SpanOptions type is not exported from the module. This change simply adds an export to the index.ts file

[coveralls]

Coverage remained the same at 88.78% when pulling c3dc39a on eli-jordan:expose-span-options into 1f32ae4 on opentracing:master.

[yurishkuro]

Could you also fix the tests? E.g. here the import should from the index, not from ../tracer, to ensure that these imports are not missed.

https://github.com/opentracing/opentracing-javascript/blob/master/src/test/opentracing_api.ts#L5

[eli-jordan]

@yurishkuro Done. I also updated mock_tracer._startSpan(...) to use the SpanOptions type

[coveralls]

Coverage remained the same at 88.78% when pulling 04eb5cb on eli-jordan:expose-span-options into 1f32ae4 on opentracing:master.

[yurishkuro]

this can go into your $HOME/.gitignore_global

[eli-jordan]

Good tip. I haven't use the global ignore file before. I reverted the change to the .gitignore

[coveralls]

Coverage increased (+0.3%) to 88.525% when pulling b17eac9 on eli-jordan:expose-span-options into 1b32dfd on opentracing:master.