Reduce supported versions to the last 10 releases

Vibe.d officially supports only the last 5 releases,
but in practice support extends much further than that.
Re-align it to 10 releases to avoid too much hassle
on developers.

Also remove the non-maintained README.md support list,
and replace it with a policy.

.travis.yml

@@ -35,11 +35,11 @@ d:
   # catching most DMD version related build failures early
   # only the latest 4 and the oldest supported versions of each compiler
   # are present to reduce the overall CI time
-  - dmd-2.091.0,dub
-  - dmd-2.077.1,dub
+  - dmd-2.093.1,dub
+  - dmd-2.083.1,dub
+  - ldc-1.22.0,dub
   - ldc-1.18.0,dub
   - ldc-1.17.0,dub
-  - ldc-1.7.0,dub
   - dmd-2.090.1,dub
   - dmd-2.085.0,dub # 2.085.1 has a regression
   - dmd-2.084.1,dub

README.md

@@ -48,42 +48,18 @@ Alternatively, you can quickstart with examples directly on [![Open on run.dlang
 Support
 -------
 
-Vibe.d aims to support at least the 5 latest minor releases of D.
-At the moment, the following compilers are supported and tested:
-
-- DMD 2.087.1
-- DMD 2.086.1
-- DMD 2.085.0
-- DMD 2.084.0
-- DMD 2.077.1
-- LDC 1.17.0 (FE: 2.087.1)
-- LDC 1.16.0 (FE: 2.086.1)
-- LDC 1.15.0 (FE: 2.085.1)
-- LDC 1.14.0 (FE: 2.084.1)
-- LDC 1.7.0 (FE: 2.077.1)
-
-
-Up to 0.8.6:
-- DMD 2.076.1
-- LDC 1.6.0 (FE: 2.076.1)
-
-Up to 0.8.4:
-- DMD 2.075.1
-- DMD 2.074.1
-- LDC 1.5.0 (FE: 2.075.1)
-- LDC 1.4.0 (FE: 2.074.1)
-
-Up to 0.8.3:
-- DMD 2.073.2
-- LDC 1.3.0 (FE: 2.073.2)
-
-Up to 0.8.2:
-- DMD 2.072.2
-- LDC 1.2.0 (FE: 2.072.2)
-
-Up to 0.8.1:
-- DMD 2.071.2
-- LDC 1.1.1 (FE: 2.071.2)
+Vibe.d supports the 10 latest minor releases of DMD.
+For example, if the current version is v2.090.1,
+then v2.089.x, v2.088.x, ... v2.080.x are supported.
+Note that support for patch release is desireable,
+but only support for the last patch in a minor is guaranteed.
+
+Additionally, Vibe.d supports all LDC versions that implement
+the version of a supported frontend (e.g. by the previous rule
+[LDC v1.20.0](https://github.com/ldc-developers/ldc/releases/tag/v1.20.0)
+implements v2.090.1 and would be supported).
+
+Finally, Vibe.d aims to support the latest version of GDC.
 
 
 Installation

appveyor.yml

@@ -2,10 +2,10 @@ platform: x64
 environment:
  matrix:
   - DC: dmd
-    DVersion: 2.091.0
+    DVersion: 2.093.1
     arch: x64
   - DC: dmd
-    DVersion: 2.091.0
+    DVersion: 2.093.1
     arch: x86_mscoff
   - DC: dmd
     DVersion: 2.090.1
@@ -17,7 +17,7 @@ environment:
     DVersion: 2.088.1
     arch: x64
   - DC: dmd
-    DVersion: 2.077.1
+    DVersion: 2.083.1
     arch: x86_mscoff
   - DC: ldc
     DVersion: 1.20.1
@@ -34,9 +34,6 @@ environment:
   - DC: ldc
     DVersion: 1.16.0
     arch: x86
-  - DC: ldc
-    DVersion: 1.7.0
-    arch: x64
 
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