refactor: init cypress-cucumber-preprocessor install.

node_modules/combine-source-map/lib/mappings-from-map.js

@@ -0,0 +1,30 @@
+var SMConsumer  =  require('source-map').SourceMapConsumer;
+
+/**
+ * @name mappingsFromMap
+ * @function
+ * @param map {Object} the JSON.parse()'ed map
+ * @return {Array} array of mappings
+ */
+module.exports = function (map) {
+  var consumer = new SMConsumer(map);
+  var mappings = [];
+
+  consumer.eachMapping(function (mapping) {
+    // only set source if we have original position to handle edgecase (see inline-source-map tests)
+    mappings.push({
+      original: mapping.originalColumn != null ? {
+        column: mapping.originalColumn
+      , line: mapping.originalLine
+      } : undefined
+    , generated: {
+        column: mapping.generatedColumn
+      , line: mapping.generatedLine
+      }
+    , source: mapping.originalColumn != null ? mapping.source : undefined
+    , name: mapping.name
+    });
+  });
+
+  return mappings;
+}