Change location of ObjectTypeIndexer to match flow

[danez]

Q	A
Bug fix?	yes
Breaking change?	no
New feature?	no
Deprecations?	no
Spec compliancy?	no
Tests added/pass?	yes
Fixed tickets	no
License	MIT

interface Dictionary { [index: string]: string; length: number; }

http://astexplorer.net/#/TtDjoZgl57/1

The location of the ObjectTypeIndexer is currently different in flow and babylon. Babylon includes the semicolon, whereas flow does not.

Usually in all parsers for ES-Code the semicolon/colon is always included, like in ClassProperties and ObjectProperties.

So I'm not sure if we should do this, because it is not super consistent, but it would be inline with the flow parser then.

//cc @samwgoldman @gabelevi @mroch

[samwgoldman]

We can also change the Flow parser to be consistent with Babylon. WDYT @mroch?

[danez]

I'm going to merge this for 7.0. If you still want to change flow at some point I'm happy to revert it, but I think it is more important right now to be more consistent with the flow parser.