Fix Exception on #EXT-X-MEDIA-TIME tag #22

[ost12666]

#22

[forbesjo]

Hi thank your for your PR! Could you make an additional update to make : required for the other tags as well? I could see other custom tags getting in a similar situation.

Additionally, adding a null/empty string check to parseAttributes (https://github.com/videojs/m3u8-parser/blob/master/src/parse-stream.js#L26) would be helpful.

[ost12666]

Done in a new PR #50 closing this one

[ost12666]

@forbesjo I tried to do a new PR but it failed because one of the parser dependencies uses 'let' and the parser node 4 tests fail. Not sure what to do now...

/home/travis/build/videojs/m3u8-parser/node_modules/videojs-standard/filterer.js:11
let key;
^^^
SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)