Fix stack.yaml format to support stack 2.0 configuration (#93)

Information is here:
http://docs.haskellstack.org/en/stable/yaml_configuration/#packages

stack.yaml

@@ -8,14 +8,7 @@ resolver: lts-14.1
 packages:
 - '.'
 - 'core'
-- location:
-    git: git@github.com:awakesecurity/proto3-suite.git
-    commit: 3f6dd6f612cf2eba3c05798926ff924b0d5ab4fa
-  extra-dep: true
-- location:
-    git: git@github.com:awakesecurity/proto3-wire.git
-    commit: 4f355bbac895d577d8a28f567ab4380f042ccc24
-  extra-dep: true
+
 
 # Override default flag values for local packages and extra-deps
 flags: {}
@@ -23,6 +16,13 @@ flags: {}
 # Extra package databases containing global packages
 extra-package-dbs: []
 
+
+extra-deps:
+- git: git@github.com:awakesecurity/proto3-suite.git
+  commit: 3f6dd6f612cf2eba3c05798926ff924b0d5ab4fa
+- git: git@github.com:awakesecurity/proto3-wire.git
+  commit: 4f355bbac895d577d8a28f567ab4380f042ccc24
+
 # Control whether we use the GHC we find on the path
 #
 # NB: It is important that this is `false`, because we do NOT want `stack` to