node_modules/@types/es6-collections/index.d.ts:24:5 - error TS2687: All declarations of 'value' must have identical modifiers.

24     value?: T;
       ~~~~~

node_modules/@types/es6-collections/index.d.ts:47:5 - error TS2687: All declarations of 'size' must have identical modifiers.

47     size: number;
       ~~~~

node_modules/@types/es6-collections/index.d.ts:53:5 - error TS2687: All declarations of 'prototype' must have identical modifiers.

53     prototype: Map<any, any>;
       ~~~~~~~~~

node_modules/@types/es6-collections/index.d.ts:67:5 - error TS2687: All declarations of 'size' must have identical modifiers.

67     size: number;
       ~~~~

node_modules/@types/es6-collections/index.d.ts:73:5 - error TS2687: All declarations of 'prototype' must have identical modifiers.

73     prototype: Set<any>;
       ~~~~~~~~~

node_modules/@types/es6-collections/index.d.ts:89:5 - error TS2687: All declarations of 'prototype' must have identical modifiers.

89     prototype: WeakMap<any, any>;
       ~~~~~~~~~

node_modules/@types/es6-collections/index.d.ts:89:5 - error TS2717: Subsequent property declarations must have the same type.  Property 'prototype' must be of type 'WeakMap<object, any>', but here has type 'WeakMap<any, any>'.

89     prototype: WeakMap<any, any>;
       ~~~~~~~~~

node_modules/@types/es6-collections/index.d.ts:102:24 - error TS2344: Type 'T' does not satisfy the constraint 'object'.

102     new <T>(): WeakSet<T>;
                           ~

node_modules/@types/es6-collections/index.d.ts:103:48 - error TS2344: Type 'T' does not satisfy the constraint 'object'.

103     new <T>(iterable: ForEachable<T>): WeakSet<T>;
                                                   ~

node_modules/@types/es6-collections/index.d.ts:104:5 - error TS2687: All declarations of 'prototype' must have identical modifiers.

104     prototype: WeakSet<any>;
        ~~~~~~~~~

node_modules/@types/es6-collections/index.d.ts:104:5 - error TS2717: Subsequent property declarations must have the same type.  Property 'prototype' must be of type 'WeakSet<object>', but here has type 'WeakSet<any>'.

104     prototype: WeakSet<any>;
        ~~~~~~~~~

node_modules/typescript/lib/lib.es2015.collection.d.ts:28:14 - error TS2687: All declarations of 'size' must have identical modifiers.

28     readonly size: number;
                ~~~~

node_modules/typescript/lib/lib.es2015.collection.d.ts:33:14 - error TS2687: All declarations of 'prototype' must have identical modifiers.

33     readonly prototype: Map<any, any>;
                ~~~~~~~~~

node_modules/typescript/lib/lib.es2015.collection.d.ts:53:14 - error TS2687: All declarations of 'prototype' must have identical modifiers.

53     readonly prototype: WeakMap<object, any>;
                ~~~~~~~~~

node_modules/typescript/lib/lib.es2015.collection.d.ts:63:14 - error TS2687: All declarations of 'size' must have identical modifiers.

63     readonly size: number;
                ~~~~

node_modules/typescript/lib/lib.es2015.collection.d.ts:68:14 - error TS2687: All declarations of 'prototype' must have identical modifiers.

68     readonly prototype: Set<any>;
                ~~~~~~~~~

node_modules/typescript/lib/lib.es2015.collection.d.ts:86:14 - error TS2687: All declarations of 'prototype' must have identical modifiers.

86     readonly prototype: WeakSet<object>;
                ~~~~~~~~~

node_modules/typescript/lib/lib.es2015.iterable.d.ts:33:5 - error TS2687: All declarations of 'value' must have identical modifiers.

33     value: T;
       ~~~~~