Add MiniscriptKey and ScriptContext aliases

We just renamed the `MinscriptKey` trait to `Key` and `ScriptContext` to
`Context`.
Add an alias for each of them to the original name. This helps backwards
compatibility but also makes the library more ergonomic since the new
names are so generic they could cause naming conflicts in downstream
crates.

Author: tcharding

src/lib.rs

@@ -140,6 +140,10 @@ use std::error;
 use bitcoin::blockdata::{opcodes, script};
 use bitcoin::hashes::{hash160, ripemd160, sha256, Hash};
 use bitcoin::locktime::absolute;
+/// `ScriptContext` alias to make usage of the library more ergonomic by reducing naming conflicts.
+pub use Context as ScriptContext;
+/// `MiniscriptKey` alias to make usage of the library more ergonomic by reducing naming conflicts.
+pub use Key as MiniscriptKey;
 
 pub use crate::descriptor::{DefiniteDescriptorKey, Descriptor, DescriptorPublicKey};
 pub use crate::interpreter::Interpreter;