Update the build matrix and formalize the ghc version support policy

.travis.yml

@@ -33,36 +33,26 @@ cache:
 #     addons: {apt: {packages: [libfcgi-dev,libgmp-dev]}}
 matrix:
   include:
-  - env: BUILD=cabal GHCVER=7.4.2 CABALVER=1.16 HAPPYVER=1.19.5 ALEXVER=3.1.7
-    compiler: ": #GHC 7.4.2"
-    addons: {apt: {packages: [cabal-install-1.16,ghc-7.4.2], sources: [hvr-ghc]}}
-  - env: BUILD=cabal GHCVER=7.6.3 CABALVER=1.16 HAPPYVER=1.19.5 ALEXVER=3.1.7
-    compiler: ": #GHC 7.6.3"
-    addons: {apt: {packages: [cabal-install-1.16,ghc-7.6.3], sources: [hvr-ghc]}}
-  - env: BUILD=cabal GHCVER=7.8.4 CABALVER=1.18 HAPPYVER=1.19.5 ALEXVER=3.1.7
-    compiler: ": #GHC 7.8.4"
-    addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4], sources: [hvr-ghc]}}
-  - env: BUILD=cabal GHCVER=7.10.3 CABALVER=1.22 HAPPYVER=1.19.5 ALEXVER=3.1.7
-    compiler: ": #GHC 7.10.3"
-    addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}
-  - env: BUILD=cabal GHCVER=8.0.2 CABALVER=1.24 HAPPYVER=1.19.5 ALEXVER=3.1.7
+  - env: BUILD=cabal GHCVER=8.0.2 CABALVER=1.24
     compiler: ": #GHC 8.0.2"
     addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.2], sources: [hvr-ghc]}}
-  - env: BUILD=cabal GHCVER=8.2.2 CABALVER=1.24 HAPPYVER=1.19.5 ALEXVER=3.1.7
+  - env: BUILD=cabal GHCVER=8.2.2 CABALVER=1.24
     compiler: ": #GHC 8.2.2"
     addons: {apt: {packages: [cabal-install-1.24,ghc-8.2.2], sources: [hvr-ghc]}}
-  - env: BUILD=cabal GHCVER=8.4.2 CABALVER=1.24 HAPPYVER=1.19.5 ALEXVER=3.1.7
+  - env: BUILD=cabal GHCVER=8.4.2 CABALVER=1.24
     compiler: ": #GHC 8.4.2"
     addons: {apt: {packages: [cabal-install-1.24,ghc-8.4.2], sources: [hvr-ghc]}}
+  - env: BUILD=cabal GHCVER=8.6.1 CABALVER=1.24
+    compiler: ": #GHC 8.6.1"
+    addons: {apt: {packages: [cabal-install-1.24,ghc-8.6.1], sources: [hvr-ghc]}}
+  - env: BUILD=cabal GHCVER=8.8.1 CABALVER=1.24
+    compiler: ": #GHC 8.8.1"
+    addons: {apt: {packages: [cabal-install-1.24,ghc-8.8.1], sources: [hvr-ghc]}}
 
   ## Build with the newest GHC and cabal-install. This is an accepted failure,
   ## see below.
-  - env: BUILD=cabal GHCVER=head  CABALVER=head HAPPYVER=1.19.5 ALEXVER=3.1.7
-    compiler: ": #GHC HEAD"
-    addons: {apt: {packages: [cabal-install-head,ghc-head], sources: [hvr-ghc]}}
-
-  - env: BUILD=stack ARGS="--resolver nightly-2019-01-30" WARNINGS=true
-    compiler: ": #stack 8.6.3"
+  - env: BUILD=stack ARGS="--resolver nightly-2020-01-30" WARNINGS=true
+    compiler: ": #stack 8.8.2"
     addons: {apt: {packages: [libgmp-dev]}}
 
   allow_failures:

README.md

@@ -808,6 +808,10 @@ something not mentioned here, send a pull request!
 [awk-patterns-article]: https://ro-che.info/articles/2018-01-08-tasty-new-patterns
 [tasty-directories]: https://nmattia.com/posts/2018-04-30-tasty-test-names.html
 
+## GHC version support policy
+
+We only support the GHC/base versions [from the last 3 years](https://wiki.haskell.org/Base_package#Versions).
+
 Maintainers
 -----------
 

stack.yaml

@@ -1,11 +1,9 @@
-resolver: nightly-2019-01-30
+resolver: nightly-2020-01-30
 packages:
 - core/
 - hunit/
 - quickcheck/
 - smallcheck/
 - core-tests/
-extra-deps:
-- wcwidth-0.0.2
-- ansi-terminal-0.9
+extra-deps: []
 flags: {}