Fix weird tap testing failures

Also adds 16.x (latest LTS) to testing suite.

xref: tapjs/tapjs#624

The issue is closed, but it is still being reported.

xref: nodejs/citgm#852 (comment)

This is the fix being used in this commit.

.github/workflows/nodejs.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [12.x, 14.x, 16.x]
 
     steps:
     - uses: actions/checkout@v1

package.json

@@ -14,10 +14,11 @@
     "test:lint": "eslint .",
     "test:tsc": "tsc ./test/ts/simple.ts --lib ES6",
     "test:ts": "node ./test/ts/simple.js",
-    "test:git": "tap test/git-check-ignore.js",
-    "test:ignore": "tap test/ignore.js",
-    "test:others": "tap test/others.js",
-    "test:cases": "tap test/*.js --coverage",
+    "tap": "tap --reporter classic",
+    "test:git": "npm run tap test/git-check-ignore.js",
+    "test:ignore": "npm run tap test/ignore.js",
+    "test:others": "npm run tap test/others.js",
+    "test:cases": "npm run tap test/*.js -- --coverage",
     "test:only": "npm run test:lint && npm run test:tsc && npm run test:ts && npm run test:cases",
     "test": "npm run test:only",
     "test:win32": "IGNORE_TEST_WIN32=1 npm run test",