Fix Repeat expander in JSON Context

[JarJak]

Fixes #150

[norberttech]

Hey @JarJak looks good but could you please add test with example of repeat expander usage that wasn't working previously?

[JarJak]

@norzechowicz sure! Can you guide me how to test if an expander works fine with JsonMatcher?

[norberttech]

Maybe try from testing example that wasn't working for you in #150

"@[email protected]({"name": "@string@", "value": "@array@"})"

This one should works now, right?

[JarJak]

@norzechowicz no, this is not a valid JSON. This one should work:

"@[email protected]({\"name\": \"@string@\", \"value\": \"@array@\"})"

[norberttech]

@JarJak I was more thining about adding those tests into this PR so it could actually prove that your fix works :P Could you merge those two?

[JarJak]

@norzechowicz they are merged... see changes in this PR

[norberttech]

right cool thanks!