correctly parse enum values

[SrTobi]

this pr fixes #103

enum values can be expressions including

• unary operators
• binary operators
• string and number literals
• parenthesis
• identifiers

See: https://github.com/microsoft/TypeScript/blob/master/doc/spec.md#92-enum-members https://github.com/microsoft/TypeScript/blob/master/doc/spec.md#419-binary-operators

Note: this implementation performs a flat parse that neither handles expression-tree-building nor operator precedences.

Note: This commit removes the minus from the NumericLit-token and parses it explicitly in TSDefParser.numberLiteral

[SrTobi]

The CI fails because it uses typescript 2.6.2 for checking the typedefinitions in samples. Sometime between that and the newest version ([email protected]) the allowed syntax seems to have been broadened, as it works for me locally.

[exoego]

TypeScript 2.6.2 was added just because it was latest when https://github.com/sjrd/scala-js-ts-importer/pull/56 was created. I think there is no reason to stay older TS, so it can be updated to 3.x.

[SrTobi]

ah ok. I did that. thx