fix(deps): update dependency i18next to v20

This MR contains the following updates:

Package	Type	Update	Change
i18next (source)	dependencies	major	^19.5.1 -> ^20.0.0

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Release Notes

i18next/i18next

v20.2.1

Compare Source

• fix lastIndex in regex when skipOnVariables is true

v20.2.0

Compare Source

• add ignoreJSONStructure into the types
• stop recursive interpolation also for "{{variable}}" when skipOnVariables is true 1595
• old browser fix for "includes" usage 1597

v20.1.0

Compare Source

• Add alwaysFormat into the types 1586
• Add interpolation key name to format function 1571

v20.0.0

Compare Source

• add support to proper augment PluginOptions type 1583
• introduce ignoreJSONStructure flag, to automatically lookup for a flat key if a nested key is not found an vice-versa 1584 (MAJOR: because of ignoreJSONStructure is true by default)

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