Merge #38: CI: Run the examples

7c6d8e3 CI: Run the examples (Tobin C. Harding)

Pull request description:

  Currently we lint the examples but we do not run them.

ACKs for top commit:
  Kixunil:
    ACK 7c6d8e3
  apoelstra:
    ACK 7c6d8e3

Tree-SHA512: c344ca36a04c106c3bdea22af9c97280a9182c91beed19c4f2d2b6503a1c1ae6bb4eb5be83be9340c311bf01681295722d57e447dabe0509704f59aebaa643d6

contrib/test.sh

@@ -54,6 +54,11 @@ if [ "$DO_FEATURE_MATRIX" = true ]; then
     done
 fi
 
+cargo run --locked --example hexy
+cargo run --locked --example custom
+cargo run --locked --example wrap_array_display_hex_trait
+cargo run --locked --example wrap_array_fmt_traits
+
 # Build the docs if told to (this only works with the nightly toolchain)
 if [ "$DO_DOCSRS" = true ]; then
     RUSTDOCFLAGS="--cfg docsrs -D warnings -D rustdoc::broken-intra-doc-links" cargo +nightly doc --all-features