📝 updated documentation of CI

.travis.yml

@@ -301,12 +301,12 @@ matrix:
   - os: linux
     compiler: clang
     env:
-      - COMPILER=clang++-6.0
+      - COMPILER=clang++-7
       - CXXFLAGS=-std=c++1z
     addons:
       apt:
-        sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-6.0']
-        packages: ['g++-6', 'clang-6.0', 'ninja-build']
+        sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-7']
+        packages: ['g++-6', 'clang-7', 'ninja-build']
 
 ################
 # build script #

README.md

@@ -1036,6 +1036,7 @@ The following compilers are currently used in continuous integration at [Travis]
 | Clang 4.0.1     | Ubuntu 14.04.1 LTS           | clang version 4.0.1-svn305264-1~exp1 (branches/release_40) |
 | Clang 5.0.2     | Ubuntu 14.04.1 LTS           | clang version 5.0.2-svn328729-1~exp1~20180509123505.100 (branches/release_50) |
 | Clang 6.0.1     | Ubuntu 14.04.1 LTS           | clang version 6.0.1-svn334776-1~exp1~20180726133705.85 (branches/release_60) |
+| Clang 7.0.1     | Ubuntu 14.04.1 LTS           | clang version 7.0.1-svn348686-1~exp1~20181213084532.54 (branches/release_70) |
 | Clang Xcode 7.3 | OSX 10.11.6 | Apple LLVM version 7.3.0 (clang-703.0.31) |
 | Clang Xcode 8.0 | OSX 10.11.6 | Apple LLVM version 8.0.0 (clang-800.0.38) |
 | Clang Xcode 8.1 | OSX 10.12.6 | Apple LLVM version 8.0.0 (clang-800.0.42.1) |