Update rails requirement from ~> 3.0.0 to ~> 5.2.3

[dependabot-preview]

Updates the requirements on rails to permit the latest version.

Release notes

Sourced from rails's releases.

5.2.3

Active Support

• Add ActiveSupport::HashWithIndifferentAccess#assoc.

  assoc can now be called with either a string or a symbol.

  Stefan Schüßler

• Fix String#safe_constantize throwing a LoadError for incorrectly cased constant references.

  Keenan Brock

• Allow Range#=== and Range#cover? on Range

  Range#cover? can now accept a range argument like Range#include? and
  Range#===. Range#=== works correctly on Ruby 2.6. Range#include? is moved
  into a new file, with these two methods.

  utilum

• If the same block is included multiple times for a Concern, an exception is no longer raised.

  Mark J. Titorenko, Vlad Bokov

Active Model

• Fix date value when casting a multiparameter date hash to not convert
  from Gregorian date to Julian date.

  Before:

  Day.new({"day(1i)"=>"1", "day(2i)"=>"1", "day(3i)"=>"1"})
  => #<Day id: nil, day: "0001-01-03", created_at: nil, updated_at: nil>
  

  After:

  Day.new({"day(1i)"=>"1", "day(2i)"=>"1", "day(3i)"=>"1"})
  => #<Day id: nil, day: "0001-01-01", created_at: nil, updated_at: nil>
  

  Fixes #28521.

  Sayan Chakraborty

• Fix numericality equality validation of BigDecimal and Float
  by casting to BigDecimal on both ends of the validation.

  Gannon McGibbon

... (truncated)

Commits

• b9ca94c Preparing for 5.2.3 release
• 3a962c4 Fix announce script
• 77956b1 Fix release template
• 657103b Preparing for 5.2.3.rc1 release
• 1b211be Fix server restart test on Puma 3.12.1 (#35696)
• b4079b1 Merge pull request #35607 from y-yagi/ensure_application_work_without_tmp_dir...
• 4e649d1 Fix Gemfile.lock
• cb9476a Fix secret_key_base for Railties
• 7a9d8c6 Merge branch 'v5-2-2-1' into 5-2-stable
• b667758 [ci skip] Improve encrypted commands USAGE
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #4.