Update dependency i18next to v19 - autoclosed #141

When calling i18next.changeLanguage() both i18next.language and i18next.languages will be set to the new language after calling loadResources -> means when accessing t function meanwhile you will get still the translations for the previous language instead of the fallback.
When is this breaking? this does not break any current test - but if you depend on accessing i18next.language or i18next.dir during language change and expect the new language this will break your app.
Reasoning: In react-i18next we get in a not ready state for loaded translations while we would prefer just waiting for the new language ready and trigger a rerender then - also a triggered rerender outside of the bound events would end in Suspense...
How can I get the language i18next will be set to? i18next.isLanguageChangingTo is set to the language called

`v17.3.1`

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typescript: Add missing cleanCode option to TypeScript def 1344

`v17.3.0`

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pass used language & namespace to postprocessor 1341

`v17.2.0`

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Support using ImmutableJS Records as the data model in interpolation 1339

`v17.1.0`

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DX improvements:

warning if accessing t before i18next was initialized or namespace loaded
warning and cancelling save if saveMissing key before i18next was initialized or namespace loaded

Both are a clear sign you render your app / call t to early not waiting for the callbacks or Promise.resolve on i18next.init, i18next.loadNamespace or i18next.changeLanguage.

`v17.0.18`

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Improve performance of EventEmitter.off 1333

`v17.0.17`

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fixes: missing nested key fails if no nested value found and defaultValue contains interpolation -> results in endless loop 1332

`v17.0.16`

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typescript: fix incorrect callback type for backend module read callback 1322
typescript: add getDataByLanguage into index.d.ts 1326

`v17.0.15`

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Fixed default value as string in IE 1325

`v17.0.14`

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typescript: Allow TFunction to receive 1-3 parameters 1317

`v17.0.13`

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fixes: Interpolation defaultVariables not recognized on t() 1314

`v17.0.12`

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remove unused Interpolator#init reset param (only used internally) 1313
Cope with null interpolation (unescaped case) 1310

`v17.0.11`

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fix issue with unset value in interpolation throwing exception
typescript: Allow augmentation of TFunction to be able to add overloads 1308

`v17.0.10`

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Update Interpolator.js to use regexSafe for unescaped interpolation 1307

`v17.0.9`

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typescript: use() should accept a class or object 1301

`v17.0.8`

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typescript: Correct use(module) types 1296

`v17.0.7`

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typescript: Typescript imports 1291
Disabled default returnedObjectHandler 1288

`v17.0.6`

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support montenegrien "crn" plurals

`v17.0.5`

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`v17.0.4`

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typescript: ResourceKey type should allow top level string value 1267

`v17.0.3`

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don't do named exports for umd

`v17.0.2`

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typescript: Allow null as TResult 1263
bring back ./i18next.js and ./i18next.min.js -> used by wildcard unpkg users...<= bad idea doing so
main export in package.json points to cjs dist

`v17.0.1`

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Improve performance of EventEmitter.off 1333

`v17.0.0`

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removes checking in build files (umd) into source code - for CDN usage use: https://unpkg.com/i18next@16.0.0/dist/umd/i18next.js
removes named exports in main file - avoids issues in mixed exports makes usage better in commonjs scenarios (node.js) - no strange const i18next = require('i18next').default;
impact you can't no longer import { changeLanguage } from 'i18next'; changeLanguage('de'); you will have to import i18next from 'i18next'; i18next.changeLanguage('de');
note if can create a own file providing the named bound functions and use that instead, sample: https://github.com/i18next/i18next/blob/v15.0.0/src/index.js#L5

`v16.0.0`

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removes deprecated jsnext:main from package.json
Bundle all entry points with rollup 1256
note: dist/es -> dist/esm, dist/commonjs -> dist/cjs (individual files -> one bundled file)