Update CLI version in ensureCli.ts

Author: shati-patel

extensions/ql-vscode/src/vscode-tests/ensureCli.ts

@@ -44,7 +44,7 @@ const _10MB = _1MB * 10;
 
 // CLI version to test. Hard code the latest as default. And be sure
 // to update the env if it is not otherwise set.
-const CLI_VERSION = process.env.CLI_VERSION || 'v2.6.3';
+const CLI_VERSION = process.env.CLI_VERSION || 'v2.7.0';
 process.env.CLI_VERSION = CLI_VERSION;
 
 // Base dir where CLIs will be downloaded into