Add stack file for testing GHCJS.

stack-ghcjs.yaml

@@ -0,0 +1,34 @@
+resolver: lts-7.19
+compiler: ghcjs-0.2.1.9007019_ghc-8.0.1
+compiler-check: match-exact
+
+setup-info:
+  ghcjs:
+    source:
+      ghcjs-0.2.1.9007019_ghc-8.0.1:
+           url: http://ghcjs.tolysz.org/ghc-8.0-2017-02-05-lts-7.19-9007019.tar.gz
+           sha1: d2cfc25f9cda32a25a87d9af68891b2186ee52f9
+packages:
+- servant-client-core/
+- servant-client-ghcjs/
+- servant/
+
+extra-deps:
+- cabal-doctest-1.0.6
+- http-api-data-0.3.7.2
+- http-types-0.12
+- text-1.2.3.0
+- aeson-1.2.4.0
+- attoparsec-0.13.2.2
+- attoparsec-iso8601-1.0.0.0
+- base-compat-0.9.3
+- case-insensitive-1.2.0.11
+- generics-sop-0.3.2.0
+- http-media-0.7.1.2
+- mmorph-1.1.1
+- natural-transformation-0.4
+- safe-0.3.17
+- vault-0.3.1.0
+- th-abstraction-0.2.6.0
+- git: https://github.com/ghcjs/ghcjs-base.git
+  commit: 3bb9ed0ffd3f384ed37456b4d6247be732c79c8e