Bumped to version 3.1.0

Release v3.0

Merge pull request lipkau#44 from michaelPf85/patch-1

Fix random Add-Content : Stream was not readable

Fixed backwards compatibility

Values should only be of type [array] when necessary. [string] otherwise

as mentioned by @EliaSaSe in
lipkau#43 (comment)

Merge pull request lipkau#43 from heilkn/arrays

Read Multiple Values for Common Key into Array

Merge pull request lipkau#39 from lipkau/enhance/WritePrettyIniFile

Added parameter `-Pretty` for writing Ini files

Release of v2.0

Merge branch 'fix/lipkau#37-RevertBreakingChanges'

Merge pull request lipkau#36 from SeverinLeonhardt/fix_accessing_dict…

…ionary_keys

Fix accessing dictionary keys

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