Drop GHC 8.2.1 support

.circleci/config.yml

@@ -195,7 +195,6 @@ workflows:
   version: 2
   multiple-ghcs:
     jobs:
-      - ghc-8.2.1
       - ghc-8.2.2
       - ghc-8.4.2
       - ghc-8.4.3

.travis.yml

@@ -54,10 +54,6 @@ jobs:
        env: GHC_VER="8.2.2"
        script: *setup
 
-     - stage: setup
-       env: GHC_VER="8.2.1"
-       script: *setup
-
      - stage: dependencies
        env: GHC_VER="8.4.4"
        script: &dependencies
@@ -75,10 +71,6 @@ jobs:
        env: GHC_VER="8.2.2"
        script: *dependencies
 
-     - stage: dependencies
-       env: GHC_VER="8.2.1"
-       script: *dependencies
-
      - stage: test
        env: GHC_VER="8.4.4"
        script: &test
@@ -96,10 +88,6 @@ jobs:
        env: GHC_VER="8.2.2"
        script: *test
 
-     - stage: test
-       env: GHC_VER="8.2.1"
-       script: *test
-
      - stage: deploy
        env: GHC_VER="8.4.4"
        script: &deploy
@@ -135,8 +123,3 @@ jobs:
        env: GHC_VER="8.2.2"
        script: *deploy
        deploy: *upload
-
-     - stage: deploy
-       env: GHC_VER="8.2.1"
-       script: *deploy
-       deploy: *upload

appveyor.yml

@@ -8,7 +8,6 @@ environment:
   - GHCVER: 8.4.3
   - GHCVER: 8.4.2
   - GHCVER: 8.2.2
-  - GHCVER: 8.2.1
 install:
 - cmd: >-
     git submodule update --init --recursive