iyi 0.3.0

A shard crosses a boundary. 0.2.0 swept nine shards through --crystal and
served HTTP from source; how many of the rest worked was not something it
measured. This release measures it, and the thing being measured changed:
crystal tool bind turns a shard into a .iyimod — declarations and object
code — and a program is built against that rather than against the shard's
source. R-1 the whole way down, for code nobody wrote in iyi.

Three shards cross, and twelve of Crystal's own namespaces, each under a gate
that runs the program and compares its answers with the same program built
from source:

kemal 1.12.0	routes, URL and query parameters, the handler chain, Kemal.run — through four boundaries, with backtracer, radix and exception_page under it
jwt 1.6.1	a token signed and read back, through four boundaries, over openssl_ext, bindata and bindata/asn1
sqlite3 0.21.0 + db	a table created, rows bound and inserted, a result set read with typed columns — two boundaries, and the first pair where one shard declares what the other must answer
twelve of Crystal's own namespaces	JSON, URI, Log, Path, Time, Base64, UUID, INI, CSV, Colorize, XML, Random

A hundred and nineteen findings came out of it and each is written down below,
measured rather than reasoned about. The ones that changed a rule: a body that travels
is compiled twice and the two are not the same function; an abstract def is a
requirement and not a header; a constant has two spellings and which one a
build picks is a fact about that build; and a module is a mixin on the other
side of a --crystal boundary, which iyi's own module header had been
assuming otherwise.

What does not cross is worth as much as what does. A shard whose surface
needs a human to write it down is refused with the list, not guessed at:
crystal tool bind prints what it could write, what a machine could write, and
what nobody can — and the last of those is a number this release moved rather
than eliminated.

.iyimod goes from format 19 to 40. A 0.2.0 artifact is rejected and rebuilt,
never migrated, which is the rule below doing its job. Artifacts written by
this release are read by every other build of it on the same target and under
the same flags.

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Install

tar -xzf iyi-0.3.0-linux-x86_64.tar.gz -C ~/.local
~/.local/bin/iyi run ~/.local/share/iyi/samples/hello.iyi

Relocatable, and carries both libraries: iyi's own 81 KB prelude and Crystal's
standard library for --crystal. bin/iyi finds them beside itself, so there
is nothing to configure and no IYI_PATH to set.

sha256 05d81c2afc86140c936ce8dca99d619eec18244678b5764bf0c66ed6df9bd747

The full list of findings is in CHANGELOG.md.