winfile 1.1.1

A maintenance release. Detection is unchanged from 1.1.0 — see those notes for
the ELF work.

winfile hardcoded its version in the source, which meant the release build
could not stamp the tag into the binary and a forgotten bump would have shipped
a stale version string with nothing to catch it. The version is now supplied at
build time, matching every other tool in the win* suite:

• Release binaries are built with -ldflags "-X main.version=vX.Y.Z" and report
  the tag they were cut from.
• A plain go build from source reports dev, rather than claiming to be a
  release it is not.

--version still takes the program name from argv[0], so a renamed copy
reports its own name.

Binaries

Asset	Platform
winfile_windows_amd64.exe	Windows, x86-64
winfile_windows_arm64.exe	Windows, ARM64
winfile_linux_amd64	Linux, x86-64
winfile_linux_arm64	Linux, ARM64

Each is self-contained: put one on your PATH and run it, nothing to extract or
install. On Linux, chmod +x it first.

Re-verified against GNU file 5.41 over the same 1348-file corpus before
publishing: no differences in the description, --mime-type, -i or
--extension.