Merge rust-bitcoin#114: simplify error message output for unsupported version output

a5efb11 chore(verify): update error message for unsupported versions (GideonBature)

Pull request description:

  #### Revised the output for unrecognised versions to:

  ```shell
    verify v1234

    Unrecognised version: v1234 (supported versions: v17 - v28)
  ```
  This removes the noise of listing all versions by displaying a concise version range.

  Closes rust-bitcoin#65

ACKs for top commit:
  AdamuAbba:
    ACK [#a5efb11](rust-bitcoin@a5efb11); successfully ran a local test.
  tcharding:
    ACK a5efb11

Tree-SHA512: 32dc7b930b20125ab8264a946a127d5d46104d75843cf95eae7693c569e6be005efb9bef902fcc01b51d960abd7f8ffc4c0083aa9c0690f218e0a5ce3c5bbb85

Author: tcharding

verify/src/main.rs

@@ -43,10 +43,8 @@ fn main() -> Result<()> {
     } else if let Ok(v) = version.parse::<Version>() {
         verify_version(v, test_output, quiet)?;
     } else {
-        eprint!("Unrecognised version: {} (supported versions:", version);
-        for version in VERSIONS {
-            eprint!(" {}", version);
-        }
+        eprint!("Unrecognised version: {} (supported versions: ", version);
+        eprint!("{} - {}", VERSIONS[0], VERSIONS[VERSIONS.len() - 1]);
         eprintln!(")");
         process::exit(1);
     }