compiler: update stack resolver lts-16.19 -> lts-19.30

To have with-utf8 1.0.2.3, because 1.0.2.1 fails building on Windows
with the following error:

  Module `GHC.IO.Encoding.Iconv' does not export `localeEncodingName'

2 files changed, 5 insertions, 5 deletions

diff --git a/compiler/stack.yaml b/compiler/stack.yaml
index 67e823b..b75c56f 100644
--- a/compiler/stack.yaml
+++ b/compiler/stack.yaml
@@ -17,7 +17,7 @@
 #
 # resolver: ./custom-snapshot.yaml
 # resolver: https://example.com/snapshots/2018-01-01.yaml
-resolver: lts-16.19
+resolver: lts-19.30
 
 
 # User packages to be built.
diff --git a/compiler/stack.yaml.lock b/compiler/stack.yaml.lock
index 93f79d9..dc48671 100644
--- a/compiler/stack.yaml.lock
+++ b/compiler/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 532177
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/19.yaml
-    sha256: d2b828ecf50386841d0c5700b58d38566992e10d63a062af497ab29ab031faa1
-  original: lts-16.19
+    sha256: 9a74d76d250a455d9cd11e74f157e087787fa9aa3c4264e69c94703d1e71aede
+    size: 619200
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/30.yaml
+  original: lts-19.30