Allow translate function to skip interpolation and return raw values instead

[manixate]

This PR allows skipping interpolation but still allows post processing of the returned values. Let me know if you want post processing to be skipped as well. I allowed it because post processing already has options.applyPostProcessor to enable or disable it.

Fixes: #1007

[coveralls]

Coverage increased (+0.1%) to 85.45% when pulling ef6fba7 on manixate:feature/skipInterpolation into b36c0a4 on i18next:master.

[jamuhl]

@manixate thanks for providing this PR. Agree with you excluding postProcessing can be done by using the other option. Will merge and publish this now.

[jamuhl]

Just doing some adjustments:

a) it's not on defaults as this is only in options passed to t function not the global i18next options (configuration) -> just an opt-out on t call
b) skipInterpolation is not applied if i18nFormat is set -> different parser (eg. ICU)

[jamuhl]

published in [email protected]

thanks again for providing this complete PR

[manixate]

I agree on:

skipInterpolation is not applied if i18nFormat is set -> different parser (eg. ICU)

For my use-case it is perfectly fine but the reason I skipped the whole i18nFormat was because the linked issue mentioned performance reasons and I thought skipping would be beneficial.

[jamuhl]

the issue was created before having those additional i18nFormats...so not affected there when using those format plugins...