add release client

Author: tedchamb

.gitignore

@@ -297,5 +297,5 @@ __pycache__/
 vsts/build/bdist.win32/
 
 # don't ignore release management client
-!azure-devops/azure/devops/v4_0/release
-!azure-devops/azure/devops/v4_1/release
+!azure-devops/azure/devops/v5_0/release
+!azure-devops/azure/devops/v5_1/release

azure-devops/azure/devops/v5_0/release/__init__.py

@@ -0,0 +1,107 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+# Generated file, DO NOT EDIT
+# Changes may cause incorrect behavior and will be lost if the code is regenerated.
+# --------------------------------------------------------------------------------------------
+
+from .models import *
+
+__all__ = [
+    'AgentArtifactDefinition',
+    'ApprovalOptions',
+    'Artifact',
+    'ArtifactMetadata',
+    'ArtifactSourceReference',
+    'ArtifactTriggerConfiguration',
+    'ArtifactTypeDefinition',
+    'ArtifactVersion',
+    'ArtifactVersionQueryResult',
+    'AuthorizationHeader',
+    'AutoTriggerIssue',
+    'BuildVersion',
+    'Change',
+    'Condition',
+    'ConfigurationVariableValue',
+    'DataSourceBindingBase',
+    'DefinitionEnvironmentReference',
+    'Deployment',
+    'DeploymentAttempt',
+    'DeploymentJob',
+    'DeploymentQueryParameters',
+    'EmailRecipients',
+    'EnvironmentExecutionPolicy',
+    'EnvironmentOptions',
+    'EnvironmentRetentionPolicy',
+    'EnvironmentTrigger',
+    'FavoriteItem',
+    'Folder',
+    'GateUpdateMetadata',
+    'GraphSubjectBase',
+    'IdentityRef',
+    'IgnoredGate',
+    'InputDescriptor',
+    'InputValidation',
+    'InputValue',
+    'InputValues',
+    'InputValuesError',
+    'InputValuesQuery',
+    'Issue',
+    'MailMessage',
+    'ManualIntervention',
+    'ManualInterventionUpdateMetadata',
+    'Metric',
+    'PipelineProcess',
+    'ProcessParameters',
+    'ProjectReference',
+    'QueuedReleaseData',
+    'ReferenceLinks',
+    'Release',
+    'ReleaseApproval',
+    'ReleaseApprovalHistory',
+    'ReleaseCondition',
+    'ReleaseDefinition',
+    'ReleaseDefinitionApprovals',
+    'ReleaseDefinitionApprovalStep',
+    'ReleaseDefinitionDeployStep',
+    'ReleaseDefinitionEnvironment',
+    'ReleaseDefinitionEnvironmentStep',
+    'ReleaseDefinitionEnvironmentSummary',
+    'ReleaseDefinitionEnvironmentTemplate',
+    'ReleaseDefinitionGate',
+    'ReleaseDefinitionGatesOptions',
+    'ReleaseDefinitionGatesStep',
+    'ReleaseDefinitionRevision',
+    'ReleaseDefinitionShallowReference',
+    'ReleaseDefinitionSummary',
+    'ReleaseDefinitionUndeleteParameter',
+    'ReleaseDeployPhase',
+    'ReleaseEnvironment',
+    'ReleaseEnvironmentShallowReference',
+    'ReleaseEnvironmentUpdateMetadata',
+    'ReleaseGates',
+    'ReleaseReference',
+    'ReleaseRevision',
+    'ReleaseSchedule',
+    'ReleaseSettings',
+    'ReleaseShallowReference',
+    'ReleaseStartEnvironmentMetadata',
+    'ReleaseStartMetadata',
+    'ReleaseTask',
+    'ReleaseTaskAttachment',
+    'ReleaseUpdateMetadata',
+    'ReleaseWorkItemRef',
+    'RetentionPolicy',
+    'RetentionSettings',
+    'SourcePullRequestVersion',
+    'SummaryMailSection',
+    'TaskInputDefinitionBase',
+    'TaskInputValidation',
+    'TaskSourceDefinitionBase',
+    'VariableGroup',
+    'VariableGroupProviderData',
+    'VariableValue',
+    'WorkflowTask',
+    'WorkflowTaskReference',
+]