Bump lts version to lts-16.12

Author: akiomik

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-haskell@v1.1
       with:
-        ghc-version: '8.8.3'
+        ghc-version: '8.8.4'
         cabal-version: '3.0'
         enable-stack: true
         stack-version: 'latest'

.github/workflows/haskell.yml

@@ -11,7 +11,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-haskell@v1
       with:
-        ghc-version: '8.8.3'
+        ghc-version: '8.8.4'
         cabal-version: '3.0'
         enable-stack: true
         stack-version: 'latest'

stack.yaml

@@ -17,7 +17,7 @@
 #
 # resolver: ./custom-snapshot.yaml
 # resolver: https://example.com/snapshots/2018-01-01.yaml
-resolver: lts-16.8
+resolver: lts-16.12
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.

stack.yaml.lock

@@ -48,7 +48,7 @@ packages:
     hackage: charsetdetect-1.1.0.2@sha256:f5aa040983c784611f8a486a0fcda3ec13005eff6f0515c4ab4aa323f6199cd8,8273
 snapshots:
 - completed:
-    size: 532379
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/8.yaml
-    sha256: 2ad3210d2ad35f3176005d68369a18e4d984517bfaa2caade76f28ed0b2e0521
-  original: lts-16.8
+    size: 532377
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/12.yaml
+    sha256: f914cfa23fef85bdf895e300a8234d9d0edc2dbec67f4bc9c53f85867c50eab6
+  original: lts-16.12