deps: import google-cloud-shared-dependencies and use flatten-maven-plugin

[chingor13]

No description provided.

[codecov]

Codecov Report

Merging #168 into master will not change coverage.
The diff coverage is 69.98%.

@@            Coverage Diff            @@
##             master     #168   +/-   ##
=========================================
  Coverage     72.41%   72.41%           
  Complexity      880      880           
=========================================
  Files            96       96           
  Lines          7431     7431           
  Branches         29       29           
=========================================
  Hits           5381     5381           
  Misses         1937     1937           
  Partials        113      113           

Impacted Files	Coverage Δ	Complexity Δ
...com/google/cloud/dialogflow/v2/AgentsSettings.java	13.20% <0.00%> (ø)	2.00 <0.00> (ø)
...m/google/cloud/dialogflow/v2/ContextsSettings.java	17.94% <0.00%> (ø)	2.00 <0.00> (ø)
...oogle/cloud/dialogflow/v2/EntityTypesSettings.java	12.28% <0.00%> (ø)	2.00 <0.00> (ø)
...om/google/cloud/dialogflow/v2/IntentsSettings.java	15.55% <0.00%> (ø)	2.00 <0.00> (ø)
...loud/dialogflow/v2/SessionEntityTypesSettings.java	18.91% <0.00%> (ø)	2.00 <0.00> (ø)
...com/google/cloud/dialogflow/v2/SessionsClient.java	43.75% <ø> (ø)	7.00 <0.00> (ø)
...om/google/cloud/dialogflow/v2/stub/AgentsStub.java	6.25% <0.00%> (ø)	1.00 <0.00> (ø)
.../google/cloud/dialogflow/v2/stub/ContextsStub.java	12.50% <0.00%> (ø)	1.00 <0.00> (ø)
...ogle/cloud/dialogflow/v2/stub/EntityTypesStub.java	5.55% <0.00%> (ø)	1.00 <0.00> (ø)
...m/google/cloud/dialogflow/v2/stub/IntentsStub.java	8.33% <0.00%> (ø)	1.00 <0.00> (ø)
... and 58 more

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