Added proxy support for azure agent and github runner

src/agent/azure/build-agent.ts

@@ -4,6 +4,7 @@ import * as taskLib from 'azure-pipelines-task-lib/task'
 import * as toolLib from 'azure-pipelines-tool-lib/tool'
 
 import { IBuildAgent, IExecResult } from '../../core/models'
+import { IRequestOptions } from 'typed-rest-client/Interfaces'
 
 @injectable()
 class BuildAgent implements IBuildAgent {
@@ -11,6 +12,14 @@ class BuildAgent implements IBuildAgent {
         return 'Azure Pipelines'
     }
 
+    public proxyConfiguration(url: string): IRequestOptions {
+        return {
+            proxy: taskLib.getHttpProxyConfiguration(url),
+            cert: taskLib.getHttpCertConfiguration(),
+            ignoreSslError: !!taskLib.getVariable('Agent.SkipCertValidation')
+        }
+    }
+
     public find(toolName: string, versionSpec: string, arch?: string): string {
         return toolLib.findLocalTool(toolName, versionSpec, arch)
     }