chore: release 2.5.0

[release-please]

🤖 I have created a release *beep* *boop*

2.5.0 (2021-04-28)

Features

• Expose supported languages of the agent; feat: add export / import flow API docs: Update docs on Pages, Session, Version, etc. (#103) (daa06ab)
• include original user query in WebhookRequest; add GetTextCaseresult API. (528192e)
• include original user query in WebhookRequest; add GetTextCaseresult API. doc: clarify resource format for session response. (#82) (ff13a97)
• support setting current_page to resume sessions; expose transition_route_groups in flows and language_code in webhook (#90) (53f1e21)
• support setting current_page to resume sessions; expose transition_route_groups in flows and language_code in webhook (#91) (cd125d3)

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[codecov]

Codecov Report

Merging #84 (9a9d3ca) into master (0a2f29b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           master      #84    +/-   ##
========================================
  Coverage   98.83%   98.83%            
========================================
  Files          33       33            
  Lines       72926    73331   +405     
  Branches     1504     1544    +40     
========================================
+ Hits        72075    72480   +405     
  Misses        823      823            
  Partials       28       28            

Impacted Files	Coverage Δ
src/v3/agents_client.ts	98.99% <100.00%> (+<0.01%)	⬆️
src/v3/flows_client.ts	99.07% <100.00%> (+0.11%)	⬆️
src/v3/pages_client.ts	98.74% <100.00%> (+0.01%)	⬆️
src/v3/sessions_client.ts	98.83% <100.00%> (+<0.01%)	⬆️
src/v3/transition_route_groups_client.ts	98.74% <100.00%> (+<0.01%)	⬆️
src/v3/versions_client.ts	98.99% <100.00%> (ø)

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[yoshi-automation]

Release is at https://github.com/googleapis/nodejs-dialogflow-cx/releases/tag/v2.5.0

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