Fix NameErrorRequire: uninitialized constant ActiveSupport::IsolatedExecutionState

[orien]

Rails does not support requiring a specific internal file without first requiring 'active_support'.

This change resolves the following error:

AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.4.2/lib/active_support/notifications.rb:274:in `registry': uninitialized constant ActiveSupport::IsolatedExecutionState (NameError)
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.4.2/lib/active_support/notifications.rb:269:in `instrumenter'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.4.2/lib/active_support/notifications.rb:206:in `instrument'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/faraday-1.10.3/lib/faraday/request/instrumentation.rb:48:in `call'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/faraday-1.10.3/lib/faraday/rack_builder.rb:154:in `build_response'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/faraday-1.10.3/lib/faraday/connection.rb:516:in `run_request'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/faraday-1.10.3/lib/faraday/connection.rb:202:in `get'
	from AvaTax-REST-V2-Ruby-SDK/lib/avatax/request.rb:26:in `request'
	from AvaTax-REST-V2-Ruby-SDK/lib/avatax/request.rb:10:in `get'
	from AvaTax-REST-V2-Ruby-SDK/lib/avatax/client/companies.rb:428:in `query_companies'
	from AvaTax-REST-V2-Ruby-SDK/spec/spec_helper.rb:20:in `<top (required)>'
	from AvaTax-REST-V2-Ruby-SDK/spec/avatax/client/accounts_spec.rb:1:in `require'
	from AvaTax-REST-V2-Ruby-SDK/spec/avatax/client/accounts_spec.rb:1:in `<top (required)>'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1435:in `load'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1435:in `block in load_spec_files'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1433:in `each'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/configuration.rb:1433:in `load_spec_files'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:100:in `setup'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:86:in `run'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:71:in `run'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/lib/rspec/core/runner.rb:45:in `invoke'
	from AvaTax-REST-V2-Ruby-SDK/vendor/bundle/ruby/2.7.0/gems/rspec-core-3.5.4/exe/rspec:4:in `<main>'

[tt]

I ran into this same issue so would very much appreciate this change being merged.

The issue can be reproduced with Ruby 2.7 or newer. The following file is sufficient to demonstrate the failure:

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'

  gem 'avatax'
end

AvaTax::Client.new.ping

[tt]

You can remove the equivalent line in spec_helper.rb:

AvaTax-REST-V2-Ruby-SDK/spec/spec_helper.rb

Line 3 in 29b239a

require 'active_support'

[tt]

@svc-developer, could this be merged?