Index: frontend/node_modules/es-abstract/es2020.js
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--- frontend/node_modules/es-abstract/es2020.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/es-abstract/es2020.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,197 @@
+'use strict';
+
+/* eslint global-require: 0 */
+// https://262.ecma-international.org/11.0/#sec-abstract-operations
+var ES2020 = {
+	'Abstract Equality Comparison': require('./2020/AbstractEqualityComparison'),
+	'Abstract Relational Comparison': require('./2020/AbstractRelationalComparison'),
+	'Strict Equality Comparison': require('./2020/StrictEqualityComparison'),
+	abs: require('./2020/abs'),
+	AddEntriesFromIterable: require('./2020/AddEntriesFromIterable'),
+	AdvanceStringIndex: require('./2020/AdvanceStringIndex'),
+	ArrayCreate: require('./2020/ArrayCreate'),
+	ArraySetLength: require('./2020/ArraySetLength'),
+	ArraySpeciesCreate: require('./2020/ArraySpeciesCreate'),
+	AsyncFromSyncIteratorContinuation: require('./2020/AsyncFromSyncIteratorContinuation'),
+	AsyncIteratorClose: require('./2020/AsyncIteratorClose'),
+	BigInt: require('./2020/BigInt'),
+	BigIntBitwiseOp: require('./2020/BigIntBitwiseOp'),
+	BinaryAnd: require('./2020/BinaryAnd'),
+	BinaryOr: require('./2020/BinaryOr'),
+	BinaryXor: require('./2020/BinaryXor'),
+	Call: require('./2020/Call'),
+	Canonicalize: require('./2020/Canonicalize'),
+	CanonicalNumericIndexString: require('./2020/CanonicalNumericIndexString'),
+	CharacterRange: require('./2020/CharacterRange'),
+	CodePointAt: require('./2020/CodePointAt'),
+	CompletePropertyDescriptor: require('./2020/CompletePropertyDescriptor'),
+	CompletionRecord: require('./2020/CompletionRecord'),
+	CopyDataProperties: require('./2020/CopyDataProperties'),
+	CreateAsyncFromSyncIterator: require('./2020/CreateAsyncFromSyncIterator'),
+	CreateDataProperty: require('./2020/CreateDataProperty'),
+	CreateDataPropertyOrThrow: require('./2020/CreateDataPropertyOrThrow'),
+	CreateHTML: require('./2020/CreateHTML'),
+	CreateIterResultObject: require('./2020/CreateIterResultObject'),
+	CreateListFromArrayLike: require('./2020/CreateListFromArrayLike'),
+	CreateMethodProperty: require('./2020/CreateMethodProperty'),
+	CreateRegExpStringIterator: require('./2020/CreateRegExpStringIterator'),
+	DateFromTime: require('./2020/DateFromTime'),
+	DateString: require('./2020/DateString'),
+	Day: require('./2020/Day'),
+	DayFromYear: require('./2020/DayFromYear'),
+	DaysInYear: require('./2020/DaysInYear'),
+	DayWithinYear: require('./2020/DayWithinYear'),
+	DefinePropertyOrThrow: require('./2020/DefinePropertyOrThrow'),
+	DeletePropertyOrThrow: require('./2020/DeletePropertyOrThrow'),
+	DetachArrayBuffer: require('./2020/DetachArrayBuffer'),
+	EnumerableOwnPropertyNames: require('./2020/EnumerableOwnPropertyNames'),
+	FlattenIntoArray: require('./2020/FlattenIntoArray'),
+	floor: require('./2020/floor'),
+	FromPropertyDescriptor: require('./2020/FromPropertyDescriptor'),
+	Get: require('./2020/Get'),
+	GetGlobalObject: require('./2020/GetGlobalObject'),
+	GetIterator: require('./2020/GetIterator'),
+	GetMethod: require('./2020/GetMethod'),
+	GetOwnPropertyKeys: require('./2020/GetOwnPropertyKeys'),
+	GetPrototypeFromConstructor: require('./2020/GetPrototypeFromConstructor'),
+	GetSubstitution: require('./2020/GetSubstitution'),
+	GetV: require('./2020/GetV'),
+	GetValueFromBuffer: require('./2020/GetValueFromBuffer'),
+	HasOwnProperty: require('./2020/HasOwnProperty'),
+	HasProperty: require('./2020/HasProperty'),
+	HourFromTime: require('./2020/HourFromTime'),
+	InLeapYear: require('./2020/InLeapYear'),
+	InstanceofOperator: require('./2020/InstanceofOperator'),
+	IntegerIndexedElementGet: require('./2020/IntegerIndexedElementGet'),
+	IntegerIndexedElementSet: require('./2020/IntegerIndexedElementSet'),
+	InternalizeJSONProperty: require('./2020/InternalizeJSONProperty'),
+	Invoke: require('./2020/Invoke'),
+	IsAccessorDescriptor: require('./2020/IsAccessorDescriptor'),
+	IsArray: require('./2020/IsArray'),
+	IsBigIntElementType: require('./2020/IsBigIntElementType'),
+	IsCallable: require('./2020/IsCallable'),
+	IsCompatiblePropertyDescriptor: require('./2020/IsCompatiblePropertyDescriptor'),
+	IsConcatSpreadable: require('./2020/IsConcatSpreadable'),
+	IsConstructor: require('./2020/IsConstructor'),
+	IsDataDescriptor: require('./2020/IsDataDescriptor'),
+	IsDetachedBuffer: require('./2020/IsDetachedBuffer'),
+	IsExtensible: require('./2020/IsExtensible'),
+	IsGenericDescriptor: require('./2020/IsGenericDescriptor'),
+	IsInteger: require('./2020/IsInteger'),
+	IsNonNegativeInteger: require('./2020/IsNonNegativeInteger'),
+	IsNoTearConfiguration: require('./2020/IsNoTearConfiguration'),
+	IsPromise: require('./2020/IsPromise'),
+	IsPropertyKey: require('./2020/IsPropertyKey'),
+	IsRegExp: require('./2020/IsRegExp'),
+	IsSharedArrayBuffer: require('./2020/IsSharedArrayBuffer'),
+	IsStringPrefix: require('./2020/IsStringPrefix'),
+	IsUnclampedIntegerElementType: require('./2020/IsUnclampedIntegerElementType'),
+	IsUnsignedElementType: require('./2020/IsUnsignedElementType'),
+	IsValidIntegerIndex: require('./2020/IsValidIntegerIndex'),
+	IsWordChar: require('./2020/IsWordChar'),
+	IterableToList: require('./2020/IterableToList'),
+	IteratorClose: require('./2020/IteratorClose'),
+	IteratorComplete: require('./2020/IteratorComplete'),
+	IteratorNext: require('./2020/IteratorNext'),
+	IteratorStep: require('./2020/IteratorStep'),
+	IteratorValue: require('./2020/IteratorValue'),
+	LengthOfArrayLike: require('./2020/LengthOfArrayLike'),
+	MakeDate: require('./2020/MakeDate'),
+	MakeDay: require('./2020/MakeDay'),
+	MakeTime: require('./2020/MakeTime'),
+	max: require('./2020/max'),
+	min: require('./2020/min'),
+	MinFromTime: require('./2020/MinFromTime'),
+	modulo: require('./2020/modulo'),
+	MonthFromTime: require('./2020/MonthFromTime'),
+	msFromTime: require('./2020/msFromTime'),
+	NewPromiseCapability: require('./2020/NewPromiseCapability'),
+	NormalCompletion: require('./2020/NormalCompletion'),
+	Number: require('./2020/Number'),
+	NumberBitwiseOp: require('./2020/NumberBitwiseOp'),
+	NumberToBigInt: require('./2020/NumberToBigInt'),
+	NumericToRawBytes: require('./2020/NumericToRawBytes'),
+	ObjectDefineProperties: require('./2020/ObjectDefineProperties'),
+	OrdinaryCreateFromConstructor: require('./2020/OrdinaryCreateFromConstructor'),
+	OrdinaryDefineOwnProperty: require('./2020/OrdinaryDefineOwnProperty'),
+	OrdinaryGetOwnProperty: require('./2020/OrdinaryGetOwnProperty'),
+	OrdinaryGetPrototypeOf: require('./2020/OrdinaryGetPrototypeOf'),
+	OrdinaryHasInstance: require('./2020/OrdinaryHasInstance'),
+	OrdinaryHasProperty: require('./2020/OrdinaryHasProperty'),
+	OrdinaryObjectCreate: require('./2020/OrdinaryObjectCreate'),
+	OrdinarySetPrototypeOf: require('./2020/OrdinarySetPrototypeOf'),
+	OrdinaryToPrimitive: require('./2020/OrdinaryToPrimitive'),
+	PromiseResolve: require('./2020/PromiseResolve'),
+	QuoteJSONString: require('./2020/QuoteJSONString'),
+	RawBytesToNumeric: require('./2020/RawBytesToNumeric'),
+	RegExpCreate: require('./2020/RegExpCreate'),
+	RegExpExec: require('./2020/RegExpExec'),
+	RequireObjectCoercible: require('./2020/RequireObjectCoercible'),
+	SameValue: require('./2020/SameValue'),
+	SameValueNonNumeric: require('./2020/SameValueNonNumeric'),
+	SameValueZero: require('./2020/SameValueZero'),
+	SecFromTime: require('./2020/SecFromTime'),
+	Set: require('./2020/Set'),
+	SetFunctionLength: require('./2020/SetFunctionLength'),
+	SetFunctionName: require('./2020/SetFunctionName'),
+	SetIntegrityLevel: require('./2020/SetIntegrityLevel'),
+	SetValueInBuffer: require('./2020/SetValueInBuffer'),
+	SpeciesConstructor: require('./2020/SpeciesConstructor'),
+	SplitMatch: require('./2020/SplitMatch'),
+	StringCreate: require('./2020/StringCreate'),
+	StringGetOwnProperty: require('./2020/StringGetOwnProperty'),
+	StringPad: require('./2020/StringPad'),
+	StringToBigInt: require('./2020/StringToBigInt'),
+	SymbolDescriptiveString: require('./2020/SymbolDescriptiveString'),
+	TestIntegrityLevel: require('./2020/TestIntegrityLevel'),
+	thisBigIntValue: require('./2020/thisBigIntValue'),
+	thisBooleanValue: require('./2020/thisBooleanValue'),
+	thisNumberValue: require('./2020/thisNumberValue'),
+	thisStringValue: require('./2020/thisStringValue'),
+	thisSymbolValue: require('./2020/thisSymbolValue'),
+	thisTimeValue: require('./2020/thisTimeValue'),
+	ThrowCompletion: require('./2020/ThrowCompletion'),
+	TimeClip: require('./2020/TimeClip'),
+	TimeFromYear: require('./2020/TimeFromYear'),
+	TimeString: require('./2020/TimeString'),
+	TimeWithinDay: require('./2020/TimeWithinDay'),
+	TimeZoneString: require('./2020/TimeZoneString'),
+	ToBigInt: require('./2020/ToBigInt'),
+	ToBigInt64: require('./2020/ToBigInt64'),
+	ToBigUint64: require('./2020/ToBigUint64'),
+	ToBoolean: require('./2020/ToBoolean'),
+	ToDateString: require('./2020/ToDateString'),
+	ToIndex: require('./2020/ToIndex'),
+	ToInt16: require('./2020/ToInt16'),
+	ToInt32: require('./2020/ToInt32'),
+	ToInt8: require('./2020/ToInt8'),
+	ToInteger: require('./2020/ToInteger'),
+	ToLength: require('./2020/ToLength'),
+	ToNumber: require('./2020/ToNumber'),
+	ToNumeric: require('./2020/ToNumeric'),
+	ToObject: require('./2020/ToObject'),
+	ToPrimitive: require('./2020/ToPrimitive'),
+	ToPropertyDescriptor: require('./2020/ToPropertyDescriptor'),
+	ToPropertyKey: require('./2020/ToPropertyKey'),
+	ToString: require('./2020/ToString'),
+	ToUint16: require('./2020/ToUint16'),
+	ToUint32: require('./2020/ToUint32'),
+	ToUint8: require('./2020/ToUint8'),
+	ToUint8Clamp: require('./2020/ToUint8Clamp'),
+	TrimString: require('./2020/TrimString'),
+	Type: require('./2020/Type'),
+	TypedArrayCreate: require('./2020/TypedArrayCreate'),
+	TypedArraySpeciesCreate: require('./2020/TypedArraySpeciesCreate'),
+	UnicodeEscape: require('./2020/UnicodeEscape'),
+	UTF16DecodeString: require('./2020/UTF16DecodeString'),
+	UTF16DecodeSurrogatePair: require('./2020/UTF16DecodeSurrogatePair'),
+	UTF16Encoding: require('./2020/UTF16Encoding'),
+	ValidateAndApplyPropertyDescriptor: require('./2020/ValidateAndApplyPropertyDescriptor'),
+	ValidateAtomicAccess: require('./2020/ValidateAtomicAccess'),
+	ValidateTypedArray: require('./2020/ValidateTypedArray'),
+	WeekDay: require('./2020/WeekDay'),
+	WordCharacters: require('./2020/WordCharacters'),
+	YearFromTime: require('./2020/YearFromTime')
+};
+
+module.exports = ES2020;