Exclude test data from being published to crates.io

These data are "binary" so somewhat hard to review. Also they increase
the package size by quite a bit. This changes reduces the package size
from 17 files, 316.5KiB (56.8KiB compressed) to 10 files, 155.0KiB
(34.1KiB compressed) which results in a ~34GB/month traffic reduction for
crates.io assuming the current 1.5 million downloads per month.

Author: weiznich

Cargo.toml

@@ -12,6 +12,7 @@ version = "0.15.0"
 name = "vte"
 edition = "2021"
 rust-version = "1.62.1"
+include = ["README.md", "LICENSE-APACHE", "LICENSE-MIT", "Cargo.toml", "src/**/*.rs"]
 
 [features]
 ansi = ["log", "cursor-icon", "bitflags"]