Index: frontend/node_modules/es-abstract/es2015.js
===================================================================
--- frontend/node_modules/es-abstract/es2015.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/es-abstract/es2015.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,142 @@
+'use strict';
+
+/* eslint global-require: 0 */
+// https://262.ecma-international.org/6.0/#sec-abstract-operations
+var ES2015 = {
+	'Abstract Equality Comparison': require('./2015/AbstractEqualityComparison'),
+	'Abstract Relational Comparison': require('./2015/AbstractRelationalComparison'),
+	'Strict Equality Comparison': require('./2015/StrictEqualityComparison'),
+	abs: require('./2015/abs'),
+	AdvanceStringIndex: require('./2015/AdvanceStringIndex'),
+	ArrayCreate: require('./2015/ArrayCreate'),
+	ArraySetLength: require('./2015/ArraySetLength'),
+	ArraySpeciesCreate: require('./2015/ArraySpeciesCreate'),
+	Call: require('./2015/Call'),
+	Canonicalize: require('./2015/Canonicalize'),
+	CanonicalNumericIndexString: require('./2015/CanonicalNumericIndexString'),
+	CharacterRange: require('./2015/CharacterRange'),
+	CompletePropertyDescriptor: require('./2015/CompletePropertyDescriptor'),
+	CompletionRecord: require('./2015/CompletionRecord'),
+	CreateDataProperty: require('./2015/CreateDataProperty'),
+	CreateDataPropertyOrThrow: require('./2015/CreateDataPropertyOrThrow'),
+	CreateHTML: require('./2015/CreateHTML'),
+	CreateIterResultObject: require('./2015/CreateIterResultObject'),
+	CreateListFromArrayLike: require('./2015/CreateListFromArrayLike'),
+	CreateMethodProperty: require('./2015/CreateMethodProperty'),
+	DateFromTime: require('./2015/DateFromTime'),
+	Day: require('./2015/Day'),
+	DayFromYear: require('./2015/DayFromYear'),
+	DaysInYear: require('./2015/DaysInYear'),
+	DayWithinYear: require('./2015/DayWithinYear'),
+	DefinePropertyOrThrow: require('./2015/DefinePropertyOrThrow'),
+	DeletePropertyOrThrow: require('./2015/DeletePropertyOrThrow'),
+	DetachArrayBuffer: require('./2015/DetachArrayBuffer'),
+	EnumerableOwnNames: require('./2015/EnumerableOwnNames'),
+	floor: require('./2015/floor'),
+	FromPropertyDescriptor: require('./2015/FromPropertyDescriptor'),
+	Get: require('./2015/Get'),
+	GetGlobalObject: require('./2015/GetGlobalObject'),
+	GetIterator: require('./2015/GetIterator'),
+	GetMethod: require('./2015/GetMethod'),
+	GetOwnPropertyKeys: require('./2015/GetOwnPropertyKeys'),
+	GetPrototypeFromConstructor: require('./2015/GetPrototypeFromConstructor'),
+	GetSubstitution: require('./2015/GetSubstitution'),
+	GetV: require('./2015/GetV'),
+	GetValueFromBuffer: require('./2015/GetValueFromBuffer'),
+	HasOwnProperty: require('./2015/HasOwnProperty'),
+	HasProperty: require('./2015/HasProperty'),
+	HourFromTime: require('./2015/HourFromTime'),
+	InLeapYear: require('./2015/InLeapYear'),
+	InstanceofOperator: require('./2015/InstanceofOperator'),
+	IntegerIndexedElementGet: require('./2015/IntegerIndexedElementGet'),
+	IntegerIndexedElementSet: require('./2015/IntegerIndexedElementSet'),
+	InternalizeJSONProperty: require('./2015/InternalizeJSONProperty'),
+	Invoke: require('./2015/Invoke'),
+	IsAccessorDescriptor: require('./2015/IsAccessorDescriptor'),
+	IsArray: require('./2015/IsArray'),
+	IsCallable: require('./2015/IsCallable'),
+	IsCompatiblePropertyDescriptor: require('./2015/IsCompatiblePropertyDescriptor'),
+	IsConcatSpreadable: require('./2015/IsConcatSpreadable'),
+	IsConstructor: require('./2015/IsConstructor'),
+	IsDataDescriptor: require('./2015/IsDataDescriptor'),
+	IsDetachedBuffer: require('./2015/IsDetachedBuffer'),
+	IsExtensible: require('./2015/IsExtensible'),
+	IsGenericDescriptor: require('./2015/IsGenericDescriptor'),
+	IsInteger: require('./2015/IsInteger'),
+	IsPromise: require('./2015/IsPromise'),
+	IsPropertyDescriptor: require('./2015/IsPropertyDescriptor'),
+	IsPropertyKey: require('./2015/IsPropertyKey'),
+	IsRegExp: require('./2015/IsRegExp'),
+	IsWordChar: require('./2015/IsWordChar'),
+	IteratorClose: require('./2015/IteratorClose'),
+	IteratorComplete: require('./2015/IteratorComplete'),
+	IteratorNext: require('./2015/IteratorNext'),
+	IteratorStep: require('./2015/IteratorStep'),
+	IteratorValue: require('./2015/IteratorValue'),
+	MakeDate: require('./2015/MakeDate'),
+	MakeDay: require('./2015/MakeDay'),
+	MakeTime: require('./2015/MakeTime'),
+	max: require('./2015/max'),
+	min: require('./2015/min'),
+	MinFromTime: require('./2015/MinFromTime'),
+	modulo: require('./2015/modulo'),
+	MonthFromTime: require('./2015/MonthFromTime'),
+	msFromTime: require('./2015/msFromTime'),
+	NewPromiseCapability: require('./2015/NewPromiseCapability'),
+	NormalCompletion: require('./2015/NormalCompletion'),
+	ObjectCreate: require('./2015/ObjectCreate'),
+	ObjectDefineProperties: require('./2015/ObjectDefineProperties'),
+	OrdinaryCreateFromConstructor: require('./2015/OrdinaryCreateFromConstructor'),
+	OrdinaryDefineOwnProperty: require('./2015/OrdinaryDefineOwnProperty'),
+	OrdinaryGetOwnProperty: require('./2015/OrdinaryGetOwnProperty'),
+	OrdinaryHasInstance: require('./2015/OrdinaryHasInstance'),
+	OrdinaryHasProperty: require('./2015/OrdinaryHasProperty'),
+	QuoteJSONString: require('./2015/QuoteJSONString'),
+	RegExpCreate: require('./2015/RegExpCreate'),
+	RegExpExec: require('./2015/RegExpExec'),
+	RequireObjectCoercible: require('./2015/RequireObjectCoercible'),
+	SameValue: require('./2015/SameValue'),
+	SameValueZero: require('./2015/SameValueZero'),
+	SecFromTime: require('./2015/SecFromTime'),
+	Set: require('./2015/Set'),
+	SetFunctionName: require('./2015/SetFunctionName'),
+	SetIntegrityLevel: require('./2015/SetIntegrityLevel'),
+	SetValueInBuffer: require('./2015/SetValueInBuffer'),
+	SpeciesConstructor: require('./2015/SpeciesConstructor'),
+	SplitMatch: require('./2015/SplitMatch'),
+	StringCreate: require('./2015/StringCreate'),
+	StringGetIndexProperty: require('./2015/StringGetIndexProperty'),
+	SymbolDescriptiveString: require('./2015/SymbolDescriptiveString'),
+	TestIntegrityLevel: require('./2015/TestIntegrityLevel'),
+	thisBooleanValue: require('./2015/thisBooleanValue'),
+	thisNumberValue: require('./2015/thisNumberValue'),
+	thisStringValue: require('./2015/thisStringValue'),
+	thisTimeValue: require('./2015/thisTimeValue'),
+	TimeClip: require('./2015/TimeClip'),
+	TimeFromYear: require('./2015/TimeFromYear'),
+	TimeWithinDay: require('./2015/TimeWithinDay'),
+	ToBoolean: require('./2015/ToBoolean'),
+	ToDateString: require('./2015/ToDateString'),
+	ToInt16: require('./2015/ToInt16'),
+	ToInt32: require('./2015/ToInt32'),
+	ToInt8: require('./2015/ToInt8'),
+	ToInteger: require('./2015/ToInteger'),
+	ToLength: require('./2015/ToLength'),
+	ToNumber: require('./2015/ToNumber'),
+	ToObject: require('./2015/ToObject'),
+	ToPrimitive: require('./2015/ToPrimitive'),
+	ToPropertyDescriptor: require('./2015/ToPropertyDescriptor'),
+	ToPropertyKey: require('./2015/ToPropertyKey'),
+	ToString: require('./2015/ToString'),
+	ToUint16: require('./2015/ToUint16'),
+	ToUint32: require('./2015/ToUint32'),
+	ToUint8: require('./2015/ToUint8'),
+	ToUint8Clamp: require('./2015/ToUint8Clamp'),
+	Type: require('./2015/Type'),
+	ValidateAndApplyPropertyDescriptor: require('./2015/ValidateAndApplyPropertyDescriptor'),
+	ValidateTypedArray: require('./2015/ValidateTypedArray'),
+	WeekDay: require('./2015/WeekDay'),
+	YearFromTime: require('./2015/YearFromTime')
+};
+
+module.exports = ES2015;