WIP: Play json build (#182)

* play json build

* build progress

* add check task

* try to make play json js build

* scalariform and mima plugins in separate files. check mima

* better error message for mima compatibility check

* fix scala 2.10 compilation

* license headers support

* add jmh support

* fix reformat on compile; fix code validation; extract base module

* remove scala 2.13 from cross versions

* include play-json in integration tests

* add example .travis.yml

* bring back scala 2.13 support

* make reformat target, not command

* add release task

* update mill version in travis.yml

* update release script

* update release process

* add README.md for play json build

1 files changed, 3 insertions, 1 deletions

diff --git a/build.sc b/build.sc
index 432ba898..134e76e9 100755
--- a/build.sc
+++ b/build.sc
@@ -189,7 +189,9 @@ def testRepos = T{
     "MILL_AMMONITE_REPO" ->
       shared.downloadTestRepo("lihaoyi/ammonite", "96ea548d5e3b72ab6ad4d9765e205bf6cc1c82ac", T.ctx().dest/"ammonite"),
     "MILL_UPICKLE_REPO" ->
-      shared.downloadTestRepo("lihaoyi/upickle", "7f33085c890db7550a226c349832eabc3cd18769", T.ctx().dest/"upickle")
+      shared.downloadTestRepo("lihaoyi/upickle", "7f33085c890db7550a226c349832eabc3cd18769", T.ctx().dest/"upickle"),
+    "MILL_PLAY_JSON_REPO" ->
+      shared.downloadTestRepo("playframework/play-json", "0a5ba16a03f3b343ac335117eb314e7713366fd4", T.ctx().dest/"play-json")
   )
 }