Enable running the tests in vscode (#83)

Using a .env file as for security reasons we don't want to commit the
`INPUT_REPO_TOKEN` environment variable to source control.

Also set the tests timeout to be 90 seconds, as the default of 30
seconds is too low for our tests.

Author: johnboyes

.gitignore

@@ -0,0 +1 @@
+*.env

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "go.testTimeout": "90s",
+    "go.testEnvFile": "${workspaceFolder}/.env"
+}