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

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.

Start in modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractTypeScriptClientCodegen.java around the referenced escaping logic, then inspect escapeText() in modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java. Verify generated TypeScript enum unions and constants escape single quotes correctly for values such as pla'ced.