v5.14.0

This release contains various features and bug fixes. Props @Angelinsky7 for several detailed bug reports.

Features:

• Correctly supports BelongsTo Eloquent relationships, adding the referential constraint to the metadata. Fixes #259.
• Modified properties of the expression parser to enable it to be extended.

Fixes:

• The correct Transaction object was not being attached to $expand requests, causing the wrong query options to be used. Fixes #261 #256 #255.
• The @context was not always being correctly created in $expand requests. Fixes #261.
• The @count was not correct in $expand requests when using the EloquentEntitySet. Fixes #254.
• Lambda operators did not use the correct precedence, causing complex expressions to fail.