Drop support for Julia < 0.6 (#15)

Author: ararslan

.travis.yml

@@ -4,8 +4,7 @@ os:
   - linux
   - osx
 julia:
-  - 0.4
-  - 0.5
+  - 0.6
   - nightly
 notifications:
   email: false

REQUIRE

@@ -1,4 +1,4 @@
-julia 0.4
+julia 0.6
 Compat 0.8.4
 BinDeps
 @osx Homebrew

appveyor.yml

@@ -1,9 +1,7 @@
 environment:
   matrix:
-  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.4/julia-0.4-latest-win32.exe"
-  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x64/0.4/julia-0.4-latest-win64.exe"
-  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.5/julia-0.5-latest-win32.exe"
-  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x64/0.5/julia-0.5-latest-win64.exe"
+  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.6/julia-0.6-latest-win32.exe"
+  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x64/0.6/julia-0.6-latest-win64.exe"
   - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x86/julia-latest-win32.exe"
   - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x64/julia-latest-win64.exe"