ci: use buildtool for check/test

Author: scivision

+stdlib/+test/MLint.txt

@@ -18,13 +18,13 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Install MATLAB
         uses: matlab-actions/setup-matlab@v1
 
-      - name: Run tests and generate artifacts
+      - name: Run tests
         timeout-minutes: 10
         uses: matlab-actions/run-command@v1
         with:
-          command: r = runtests('stdlib.test'), assert(~isempty(r)), assertSuccess(r)
+          command: buildtool

+stdlib/+test/TestLint.m

@@ -1,9 +1,13 @@
 function plan = buildfile
 plan = buildplan(localfunctions);
+plan.DefaultTasks = "test";
+plan("test").Dependencies = "check";
 end
 
-function lintTask(~)
-assertSuccess(runtests('stdlib.test.TestLint'))
+function checkTask(~)
+% Identify code issues (recursively all Matlab .m files)
+issues = codeIssues;
+assert(isempty(issues.Issues),formattedDisplayText(issues.Issues))
 end
 
 function testTask(~)