[ruby-core:111899] [Ruby master Misc#19353] Drop gcc <= 6 and clang <= 9

Issue #19353 has been reported by shyouhei (Shyouhei Urabe). ---------------------------------------- Misc #19353: Drop gcc <= 6 and clang <= 9 https://bugs.ruby-lang.org/issues/19353 * Author: shyouhei (Shyouhei Urabe) * Status: Open * Priority: Normal ---------------------------------------- We test those old compilers using Ubuntu bionic. This OS is reaching its EOL. Making them available would become harder. I would like to drop supporting them. Any opinions? -- https://bugs.ruby-lang.org/