Added create/update to Theme service

Merge pull request #24 from Pawandeepalw/feature/theme-upload

Added Theme create/update functionality

Filter parameter on productService/getMetafields

Merge pull request #22 from bold-commerce/product-metafields-filter

Filter parameter on productService/getMetafields

1.2.15: Customer Address API (#21)

* Customer Address API

* Customer Address model

* refactoring

1.2.14: Feature added to activate charges (#20)

* Activate Shopify Accepted Charges

* Activate Charge updated

* Linting fixed

* Refactored

* Fixed ID issue

RateLimitKeyGenerator optional

Make rateLimitKeyGenerator is optional

Pluggable rate limiter

Add support for an optional rate limiter

Move order property translation into a trait

Minor housekeeping/organization release

Add params to create variant metafield

Allow Params for getting Variant Metafields (#18)

* Allow params for getting variant metafields

Translate props/attrs for draft order creation

Line item properties and release notes were not being handled properly.

Add send invite to customer

Add send invite to customer service function to trigger the account creation invitation email from Shopify.