refactor: Give the key variable a better name

The "key" within the flatten function in fact is the name and version
string of the currently processed dependency package

lib/index.js

@@ -44,34 +44,34 @@ function first_or_second(obj1, obj2) {
 const flatten = function flatten(options) {
     const moduleInfo = { licenses: UNKNOWN };
     const { color: colorize, deps: json, unknown } = options;
-    const key = `${json.name}@${json.version}`;
+    const currentPackageNameAndVersion = `${json.name}@${json.version}`;
     let dirFiles;
     let files = [];
     let licenseData;
     let licenseFile;
     let noticeFiles = [];
     let readmeFile;
     let { data } = options;
-    let clarification = options.clarifications?.[key];
+    let clarification = options.clarifications?.[currentPackageNameAndVersion];
     let passed_clarification_check = clarification?.checksum ? false : true;
 
     if (json.private) {
         moduleInfo.private = true;
     }
 
-    // If we have processed this key already, just return the data object.
+    // If we have processed this currentPackageNameAndVersion already, just return the data object.
     // This was added so that we don't recurse forever if there was a circular
     // dependency in the dependency tree.
     /*istanbul ignore next*/
-    if (data[key]) {
+    if (data[currentPackageNameAndVersion]) {
         return data;
     }
 
     if ((options.production && json.extraneous) || (options.development && !json.extraneous && !json.root)) {
         return data;
     }
 
-    data[key] = moduleInfo;
+    data[currentPackageNameAndVersion] = moduleInfo;
 
     // Include property in output unless custom format has set property to false.
     function mustInclude(property) {
@@ -215,7 +215,7 @@ const flatten = function flatten(options) {
                     let sha256 = createHash('sha256').update(content).digest('hex');
 
                     if (clarification.checksum !== sha256) {
-                        console.error(`Clarification checksum mismatch for ${key} :(\nFile checked: ${licenseFile}`);
+                        console.error(`Clarification checksum mismatch for ${currentPackageNameAndVersion} :(\nFile checked: ${licenseFile}`);
                         process.exit(1);
                     } else {
                         passed_clarification_check = true;
@@ -343,7 +343,7 @@ const flatten = function flatten(options) {
     }
 
     if (!json.name || !json.version) {
-        delete data[key];
+        delete data[currentPackageNameAndVersion];
     }
 
     /*istanbul ignore next*/