Upgrade to GHC 8.6 (#518)

* Use new pact nix infrastructure and GHC 8.6

* Bump these version bound

* Add semialign dependency

* Bump pact

* New version of pact requires new hedgehog-fn

* Fix shell.nix

* Change binary paths

* Bump these lower bound

.gitlab-ci.yml

@@ -53,7 +53,7 @@ nix-linux:
     - cat .vcs-info
     - nix-build --option extra-sandbox-paths '/etc/protocols /etc/services'
     - nix-shell --run "echo Done with shell test"
-    - ./result/ghc/chainweb/bin/chainweb-node --version
+    - ./result/bin/chainweb-node --version
     # - nix-build --option extra-sandbox-paths '/etc/protocols /etc/services' -A ghc.chainweb.doc
 
 #    NOTE: If we want artifacts to inclue code coverage reports, we have to pass
@@ -83,7 +83,7 @@ slow-tests:
   script:
     - echo This is a master slow test run.
     - nix-build --option extra-sandbox-paths '/etc/protocols /etc/services'
-    - result/ghc/chainweb/bin/cwtool slow-tests +RTS -N4
+    - result/bin/cwtool slow-tests +RTS -N4
 
 # pages:
 #   stage: deploy
@@ -107,4 +107,4 @@ nightly-nix:
 
     # It probably makes sense to run coverage nightly
     - nix-build --option extra-sandbox-paths '/etc/protocols /etc/services' --arg runCoverage true
-    - result/ghc/chainweb/bin/cwtool slow-tests +RTS -N4
+    - result/bin/cwtool slow-tests +RTS -N4

chainweb.cabal

@@ -331,6 +331,7 @@ library
         , resourcet >= 1.2
         , safeio >= 0.0
         , safe-exceptions >= 0.1
+        , semialign >= 1
         , servant >= 0.14
         , servant-client >= 0.14
         , servant-client-core >= 0.14
@@ -348,7 +349,7 @@ library
         , swagger2 >= 2.2
         , temporary >= 1.3
         , text >= 1.2
-        , these >= 0.7 && < 1
+        , these >= 1 && < 1.1
         , time >= 1.8
         , tls >=1.5
         , token-bucket >= 0.1
@@ -466,6 +467,7 @@ test-suite chainweb-tests
         , resourcet >= 1.2
         , retry >= 0.7
         , scheduler >= 1.4
+        , semialign >= 1
         , servant >= 0.14
         , servant-client >= 0.14
         , servant-client-core >= 0.14
@@ -481,7 +483,7 @@ test-suite chainweb-tests
         , tasty-quickcheck >= 0.9
         , temporary >= 1.3
         , text >=1.2
-        , these >= 0.7 && < 1
+        , these >= 1 && < 1.1
         , time >= 1.8
         , transformers >= 0.5
         , unordered-containers >= 0.2