In the interest of moving nightly PackageEvaluator testing to running
against 0.4, 0.5, and 0.6-dev, I'm proposing we freeze METADATA for Julia
0.3. New package versions that support Julia 0.3 would fail the Travis
check, by default. We can make case-by-case exceptions if absolutely
needed, but I believe this is the safest path forward to leaving Julia 0.3
alone - what currently works should remain working, and nothing new could
break by releasing some new package versions that do support 0.3 when other
packages that may depend on that package have moved on to only supporting
Julia 0.4 a while ago.
If you're a package author, check the minimum Julia version dependency in
your REQUIRE file. If it already says 0.4 or later, you don't need to do
anything. If it still says 0.3, this change would mean you should raise the
minimum Julia version to (at least) 0.4 before making your next tag. And
when you make that new tag, since it's dropping Julia 0.3 support it should
use a new package minor version via Pkg.tag("Foo", :minor).
If anyone has any comments or objections, let me know at
https://github.com/JuliaLang/METADATA.jl/pull/6146. I'll be leaving that
open for at least a few days.