extension/package.json: upgrade @types/vscode and vscode engine

vscode v1.71.0 TestRunProfile interface introduce property
supportContinuousRun (default false).
microsoft/vscode#134941

vscode v1.81 TestController interface introduce property
invalidateTestResults
mircosoft/vscode#134970

vscode v1.86 TestRunProfile interface introduce property
invalidate onDidChangeDefault.
microsoft/vscode#193160

vscode v1.88 TestRun interface introduce property addCoverage,
onDidDispose.
microsoft/vscode#208463

vscode v1.90 TestRunRequest class introduce non-optional property
preserveFocus.
microsoft/vscode#213601

Last update CL 559737.

The latest version of vscode 1.100.0 and he vscode 1.90.0
is released May 2024.
See https://code.visualstudio.com/updates/v1_90

Change-Id: I8abc9e206cdd842b1b75e264feeaee3cb27eda07
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/677156
kokoro-CI: kokoro <noreply+kokoro@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Madeline Kalil <mkalil@google.com>
Reviewed-by: Ethan Reesor <ethan.reesor@gmail.com>

Author: h9jiang

README.md

@@ -10,7 +10,7 @@ provides rich language support for the
 
 ## Requirements
 
-* Visual Studio Code 1.75 or newer (or editors compatible with VS Code 1.75+ APIs)
+* Visual Studio Code 1.90 or newer (or editors compatible with VS Code 1.90+ APIs)
 * Go 1.21 or newer.
 
 ## Quick Start