Add gcc 7.3
@@ -53,7 +53,7 @@ compiler:
version: ["4.1", "4.4", "4.5", "4.6", "4.7", "4.8", "4.9",
"5", "5.1", "5.2", "5.3", "5.4",
"6", "6.1", "6.2", "6.3", "6.4",
- "7", "7.1", "7.2"]
+ "7", "7.1", "7.2", "7.3"]
libcxx: [libstdc++, libstdc++11]
threads: [None, posix, win32] # Windows MinGW
exception: [None, dwarf2, sjlj, seh] # Windows MinGW
