feat(LEXER): support function names containing dots

Author: niall-byrne

lib/bashcov/lexer.rb

@@ -104,7 +104,7 @@ def relevant?(line)
                       line.start_with?(*IGNORE_START_WITH) ||
                       line.end_with?(*IGNORE_END_WITH)
 
-      return false if line =~ /\A[a-zA-Z_][a-zA-Z0-9_\-:]*\(\)/ # function declared without the `function` keyword
+      return false if line =~ /\A[a-zA-Z_][a-zA-Z0-9_\-:\.]*\(\)/ # function declared without the `function` keyword
       return false if line =~ /\A[^)]+\)\Z/ # case statement selector, e.g. `--help)`
 
       true