feat: returnvalue token parser

.flowconfig

@@ -1,6 +1,7 @@
 [ignore]
 <PROJECT_ROOT>/lib/.*
 <PROJECT_ROOT>/node_modules/.*
+<PROJECT_ROOT>/test/.*
 
 [libs]
 flow-typed/

.gitattributes

@@ -0,0 +1 @@
+* text eol=lf

flow-typed/npm/chai-datetime_vx.x.x.js

@@ -0,0 +1,39 @@
+// flow-typed signature: f041f510a7750be7b298b3ce9e122452
+// flow-typed version: <<STUB>>/chai-datetime_v^1.5.0/flow_v0.72.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'chai-datetime'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'chai-datetime' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'chai-datetime/chai-datetime' {
+  declare module.exports: any;
+}
+
+declare module 'chai-datetime/test/test' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'chai-datetime/chai-datetime.js' {
+  declare module.exports: $Exports<'chai-datetime/chai-datetime'>;
+}
+declare module 'chai-datetime/test/test.js' {
+  declare module.exports: $Exports<'chai-datetime/test/test'>;
+}