Try to fix compile errors

Author: Kartik Raj

src/vs/workbench/api/common/extHostTerminalService.ts

@@ -50,7 +50,7 @@ export interface IExtHostTerminalService extends ExtHostTerminalServiceShape, ID
 	registerLinkProvider(provider: vscode.TerminalLinkProvider): vscode.Disposable;
 	registerProfileProvider(extension: IExtensionDescription, id: string, provider: vscode.TerminalProfileProvider): vscode.Disposable;
 	registerTerminalQuickFixProvider(id: string, extensionId: string, provider: vscode.TerminalQuickFixProvider): vscode.Disposable;
-	getEnvironmentVariableCollection(extension: IExtensionDescription): vscode.EnvironmentVariableCollection & { getScopedEnvironmentVariableCollection(scope: vscode.EnvironmentVariableScope | undefined): vscode.EnvironmentVariableCollection };
+	getEnvironmentVariableCollection(extension: IExtensionDescription): vscode.EnvironmentVariableCollection | { getScopedEnvironmentVariableCollection(scope: vscode.EnvironmentVariableScope | undefined): vscode.EnvironmentVariableCollection };
 }
 
 export interface ITerminalInternalOptions {
@@ -823,7 +823,7 @@ export abstract class BaseExtHostTerminalService extends Disposable implements I
 		return index;
 	}
 
-	public getEnvironmentVariableCollection(extension: IExtensionDescription): vscode.EnvironmentVariableCollection & { getScopedEnvironmentVariableCollection(scope: vscode.EnvironmentVariableScope | undefined): vscode.EnvironmentVariableCollection } {
+	public getEnvironmentVariableCollection(extension: IExtensionDescription): vscode.EnvironmentVariableCollection | { getScopedEnvironmentVariableCollection(scope: vscode.EnvironmentVariableScope | undefined): vscode.EnvironmentVariableCollection } {
 		let collection = this._environmentVariableCollections.get(extension.identifier.value);
 		if (!collection) {
 			collection = new EnvironmentVariableCollection();

src/vscode-dts/vscode.proposed.envCollectionWorkspace.d.ts

@@ -14,7 +14,7 @@ declare module 'vscode' {
 		 *
 		 * @param scope The scope to which the environment variable collection applies to.
 		 */
-		readonly environmentVariableCollection: EnvironmentVariableCollection & { getScopedEnvironmentVariableCollection(scope: EnvironmentVariableScope): EnvironmentVariableCollection };
+		readonly environmentVariableCollection: EnvironmentVariableCollection | { getScopedEnvironmentVariableCollection(scope: EnvironmentVariableScope): EnvironmentVariableCollection };
 	}
 
 	export type EnvironmentVariableScope = {