add CI pipeline with lint, test, build

node_modules/eslint-scope/lib/assert.js

@@ -0,0 +1,17 @@
+/**
+ * @fileoverview Assertion utilities.
+ * @author Nicholas C. Zakas
+ */
+
+/**
+ * Throws an error if the given condition is not truthy.
+ * @param {boolean} condition The condition to check.
+ * @param {string} message The message to include with the error.
+ * @returns {void}
+ * @throws {Error} When the condition is not truthy.
+ */
+export function assert(condition, message = "Assertion failed.") {
+	if (!condition) {
+		throw new Error(message);
+	}
+}