Release v0.1.2

[kidunot89]

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What does this implement/fix? Explain your changes.

• The CartItem connection contents on the Cart type now resolves an empty array instead of a null value when the cart is empty.
• The attributeTerm where argument on Product connection now accept the term slug instead of the term ID.
• QL_Session_Handler class implemented. A WooCommerce session handler used on GraphQL requests. QL Session Handler #88
• Add show_in_graphql flag to WC CPTs. More info here PUNTED.
• Fix ProductAttribute resolution for variable-type products
• Create VariationAttribute a cacheable global id field.

Does this close any currently open issues?

#85 #87

Any relevant logs, error output, GraphiQL screenshots, etc?

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Any other comments?

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Where has this been tested?

Operating System: Ubuntu 18.04

WordPress Version: 5.2