[Bug][TypeScript]: single quote in enums not escaped

[macjohnny]

Description

When defining a model property as an enum, single quotes are not escaped.

Example input:

definitions:
  Order:
    title: Pet Order
    description: An order for a pets from the pet store
    type: object
    properties:
      status:
        type: string
        description: Order Status
        enum:
          - pla'ced
          - approved
          - delivered

Example output:

export interface Order {
    status?: Order.StatusEnum;
}
export namespace Order {
    export type StatusEnum = 'pla'ced' | 'approved' | 'delivered';
    export const StatusEnum = {
        Placed: 'pla'ced' as StatusEnum,
        Approved: 'approved' as StatusEnum,
        Delivered: 'delivered' as StatusEnum
    }
}

Swagger-codegen version

2.3.0

Suggest a fix/enhancement

Fixing the escaping in https://github.com/swagger-api/swagger-codegen/blob/v2.3.0/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractTypeScriptClientCodegen.java#L342
should solve the issue.
The escapeText() method in
https://github.com/swagger-api/swagger-codegen/blob/v2.3.0/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java#L376
does not escape single quotes.

[macjohnny]

The escapeQuotationMark() method in https://github.com/swagger-api/swagger-codegen/blob/v2.3.0/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractTypeScriptClientCodegen.java#L427
is broken too, as it removes single quotes rather than escaping them.
But as stated in the original method https://github.com/swagger-api/swagger-codegen/blob/v2.3.0/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java#L412 both quote types should be escaped, which would allow using this function in https://github.com/swagger-api/swagger-codegen/blob/v2.3.0/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractTypeScriptClientCodegen.java#L342 in order to fix this issue.

[macjohnny]

cc @wing328

[macjohnny]

this issue also affects the typescript angular generator

[macjohnny]

@wing328 could you add this to the 2.4.0 milestone?