Upgrade to GHC 8.6.3

No code changes required; only CI:

- Drop 8.2 build
- Add 8.6.3 build
- Update default build to 8.6.3

.circleci/config.yml

@@ -57,16 +57,16 @@ references:
 jobs:
   build:
     <<: *stack_build
-  build_8.2.2:
-    <<: *stack_build
-    environment:
-      STACK_ARGUMENTS: --no-terminal
-      STACK_YAML: stack-lts-11.18.yaml
   build_8.4.3:
     <<: *stack_build
     environment:
       STACK_ARGUMENTS: --no-terminal
       STACK_YAML: stack-lts-12.2.yaml
+  build_8.6.3:
+    <<: *stack_build
+    environment:
+      STACK_ARGUMENTS: --no-terminal
+      STACK_YAML: stack-lts-13.2.yaml
   build_nightly:
     <<: *stack_build
     environment:
@@ -81,8 +81,8 @@ workflows:
   commit:
     jobs:
       - build
-      - build_8.2.2
       - build_8.4.3
+      - build_8.6.3
       - build_nightly
   nightly:
     triggers:

stack-lts-11.18.yaml

@@ -1,4 +0,0 @@
----
-resolver: lts-11.18
-extra-deps:
-  - hoauth2-1.7.2

stack-lts-13.2.yaml

@@ -0,0 +1,2 @@
+---
+resolver: lts-13.2

stack.yaml

@@ -1,10 +1,2 @@
 ---
-resolver: lts-12.2
-extra-deps:
-  - hoauth2-1.7.2
-  - uri-bytestring-aeson-0.1.0.6
-ghc-options:
-  "$locals": -fhide-source-paths
-
-# needed so resourcet can get exceptions-0.10 even though hoauth dislikes it
-allow-newer: true
+resolver: lts-13.2