Vendor main dependencies.

vendor/github.com/BurntSushi/ty/doc.go

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+/*
+Package ty provides utilities for writing type parametric functions with run
+time type safety.
+
+This package contains two sub-packages `fun` and `data` which define some
+potentially useful functions and abstractions using the type checker in
+this package.
+
+Requirements
+
+Go tip (or 1.1 when it's released) is required. This package will not work
+with Go 1.0.x or earlier.
+
+The very foundation of this package only recently became possible with the
+addition of 3 new functions in the standard library `reflect` package:
+SliceOf, MapOf and ChanOf. In particular, it provides the ability to
+dynamically construct types at run time from component types.
+
+Further extensions to this package can be made if similar functions are added
+for structs and functions(?).
+*/
+package ty