💚 fix compiler selection

.travis.yml

@@ -292,11 +292,11 @@ matrix:
 
   - os: linux
     compiler: clang
-    env: COMPILER=clang++-7.0
+    env: COMPILER=clang++-7
     addons:
       apt:
         sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-7']
-        packages: ['g++-6', 'clang-7.0', 'ninja-build']
+        packages: ['g++-6', 'clang-7', 'ninja-build']
 
   - os: linux
     compiler: clang

README.md

@@ -1046,7 +1046,7 @@ The following compilers are currently used in continuous integration at [Travis]
 | Clang Xcode 9.2 | OSX 10.13.3 | Apple LLVM version 9.1.0 (clang-902.0.39.1) |
 | Clang Xcode 9.3 | OSX 10.13.3 | Apple LLVM version 9.1.0 (clang-902.0.39.2) |
 | Clang Xcode 10.0 | OSX 10.13.3 | Apple LLVM version 10.0.0 (clang-1000.11.45.2) |
-| Clang Xcode 10.1 | OSX 10.13.3 |  |
+| Clang Xcode 10.1 | OSX 10.13.3 | Apple LLVM version 10.0.0 (clang-1000.11.45.5) |
 | Visual Studio 14 2015 | Windows Server 2012 R2 (x64) | Microsoft (R) Build Engine version 14.0.25420.1, MSVC 19.0.24215.1 |
 | Visual Studio 2017 | Windows Server 2016 | Microsoft (R) Build Engine version 15.7.180.61344, MSVC 19.14.26433.0 |