Aside from minor improvements and bug fixes, this release has one change to the language that is not compatible with previous versions.
Some users pointed out that import "foo" + bar had surprising behavior, because it looks like it will compute the name of the import, but in actual fact it is parsed as (import "foo") + bar, which converts the imported Jsonnet file to a string, then appends bar to it. In order to avoid that confusion, we've make the parentheses mandatory in those cases.
The vast majority of imports, which are unambiguous, are not affected. For example:
local foo = import "foo";
This release also fixes the compilation of Jsonnet during pip install.