vscode rust tasks.json

tasks.json

{
  // See https://go.microsoft.com/fwlink/?LinkId=733558
  // for the documentation about the tasks.json format
  "version": "0.1.0",
  "tasks": [
    {"taskName": "build", "isBuildCommand": true, "command": "cargo", "args":["build"], "showOutput": "always" },
    {"taskName": "test", "isTestCommand": true, "command": "cargo", "args":["test"], "showOutput": "always" },
    {"taskName": "release", "command": "cargo", "args":["build", "--release"], "showOutput": "always" }
  ]
}