Update tzinfo requirement from ~> 1.2 to ~> 2.0

[dependabot]

Updates the requirements on tzinfo to permit the latest version.

Release notes

Sourced from tzinfo's releases.

v2.0.6

• Eliminate Object#untaint deprecation warnings on JRuby 9.4.0.0. #145.

TZInfo v2.0.6 on RubyGems.org

Changelog

Sourced from tzinfo's changelog.

Version 2.0.6 - 28-Jan-2023

• Eliminate Object#untaint deprecation warnings on JRuby 9.4.0.0. #145.

Version 2.0.5 - 19-Jul-2022

• Changed DateTime results to always use the proleptic Gregorian calendar. This affects DateTime results prior to 1582-10-15 and any arithmetic performed on the results that would produce a secondary result prior to 1582-10-15.
• Added support for eager loading all the time zone and country data by calling either TZInfo::DataSource#eager_load! or TZInfo.eager_load!. Compatible with Ruby On Rails' eager_load_namespaces. #129.
• Ignore the SECURITY file from Arch Linux's tzdata package. #134.

Version 2.0.4 - 16-Dec-2020

• Fixed an incorrect InvalidTimezoneIdentifier exception raised when loading a zoneinfo file that includes rules specifying an additional transition to the final defined offset (for example, Africa/Casablanca in version 2018e of the Time Zone Database). #123.

Version 2.0.3 - 8-Nov-2020

• Added support for handling "slim" format zoneinfo files that are produced by default by zic version 2020b and later. The POSIX-style TZ string is now used calculate DST transition times after the final defined transition in the file. #120.
• Fixed TimeWithOffset#getlocal returning a TimeWithOffset with the timezone_offset still assigned when called with an offset argument on JRuby 9.3.
• Rubinius is no longer supported.

Version 2.0.2 - 2-Apr-2020

• Fixed 'wrong number of arguments' errors when running on JRuby 9.0. #114.
• Fixed warnings when running on Ruby 2.8. #113.

Version 2.0.1 - 24-Dec-2019

• Fixed "SecurityError: Insecure operation - require" exceptions when loading data with recent Ruby releases in safe mode. #100.
• Fixed warnings when running on Ruby 2.7. #109.
• Added a TZInfo::Timezone#=~ method that performs a regex match on the time zone identifier. #99.

... (truncated)

Commits

• d5893c9 Fix formatting.
• 5561942 Preparing v2.0.6.
• ec27c09 Add v1.2.11 from the 1.2 branch.
• d77da3f Update copyright years.
• eac33df Eliminate Object#untaint deprecation warnings on JRuby 9.4.0.0.
• 19f984c Add Ruby 3.2 and JRuby 9.4.
• e9fe818 Update the dependency on actions/checkout.
• f76bc7f Fix include issues with tests on Ruby 3.2.
• 8a781cf Revert "Workaround for 'Permission denied - NUL' errors with JRuby on Windows."
• d9b289e Preparing v2.0.5.
• Additional commits viewable in compare view

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