[Tests] run nyc on all tests; use tape runner

.eslintignore

@@ -0,0 +1 @@
+coverage/

.nycrc

@@ -0,0 +1,13 @@
+{
+	"all": true,
+	"check-coverage": false,
+	"reporter": ["text-summary", "text", "html", "json"],
+	"lines": 86,
+	"statements": 85.93,
+	"functions": 82.43,
+	"branches": 76.06,
+	"exclude": [
+		"coverage",
+		"test"
+	]
+}

package.json

@@ -7,7 +7,7 @@
 		"prepublish": "not-in-publish || safe-publish-latest",
 		"lint": "eslint .",
 		"pretest": "npm run lint",
-		"tests-only": "node test",
+		"tests-only": "nyc tape 'test/**/*.js'",
 		"test": "npm run tests-only",
 		"posttest": "npx aud --production",
 		"version": "auto-changelog && git add CHANGELOG.md",
@@ -41,6 +41,7 @@
 		"eslint": "^6.8.0",
 		"for-each": "^0.3.3",
 		"in-publish": "^2.0.1",
+		"nyc": "^10.3.2",
 		"object-inspect": "^1.7.0",
 		"object-is": "^1.0.2",
 		"safe-publish-latest": "^1.1.4",