Add a global "no heuristics" flag for validator debugging

src/apply-validators.js

@@ -12,7 +12,12 @@ module.exports = function applyValidators(value, rules, context = {}) {
 	let normalizedRules = normalizeRules(rules, { normalizeObjects: true });
 	let validator = composeRules.compose(normalizedRules);
 
-	let { errors, newValue } = validator(value, context);
+	// FIXME: Document this option!
+	let finalContext = (process.env.VALIDATEM_NO_HEURISTICS === "1")
+		? { ...context, __validatemNoHeuristics: true }
+		: context;
+
+	let { errors, newValue } = validator(value, finalContext);
 
 	// NOTE: We mutate the error here, because Error objects are not safely cloneable
 	for (let error of errors) {