Add support for function name containing dashes

This is not POSIX compliant but most shells do support it.

https://unix.stackexchange.com/questions/482417/will-it-be-bad-that-a-function-or-script-name-contains-dash-instead-of-under

[Fixes #93]

Author: infertux

lib/bashcov/lexer.rb

@@ -106,7 +106,7 @@ def relevant?(line)
                            line.start_with?(*IGNORE_START_WITH) ||
                            line.end_with?(*IGNORE_END_WITH)
 
-      relevant &= false if line =~ /\A[a-zA-Z_][a-zA-Z0-9_:]*\(\)/ # function declared without the `function` keyword
+      relevant &= false if line =~ /\A[a-zA-Z_][a-zA-Z0-9_\-:]*\(\)/ # function declared without the `function` keyword
       relevant &= false if line =~ /\A[^)]+\)\Z/ # case statement selector, e.g. `--help)`
 
       relevant

spec/support/test_app.rb

@@ -20,7 +20,7 @@ def expected_coverage
     "#{test_app}/scripts/cd.sh" => [nil, nil, 1, 2, nil, 3, 1, 3, nil, 2, nil, nil, 1, nil, 3, nil, 6, nil, 1, nil, 1],
     "#{test_app}/scripts/comments.sh" => [nil, nil, 1, nil, 1, nil, nil, nil, 1, nil, 1],
     "#{test_app}/scripts/delete.sh" => [nil, nil, 1, 1, 1, 1, nil, 1, 1],
-    "#{test_app}/scripts/function.sh" => [nil, nil, nil, 2, nil, nil, nil, 1, 1, nil, nil, nil, nil, 1, nil, nil, nil, 1, nil, nil, 1, 1, 1, 1],
+    "#{test_app}/scripts/function.sh" => [nil, nil, nil, 2, nil, nil, nil, 1, 1, nil, nil, nil, nil, 1, nil, nil, nil, 0, nil, nil, nil, 1, nil, nil, 1, 1, 1, 1],
     "#{test_app}/scripts/long_line.sh" => [nil, nil, 1, 1, 1, 0],
     "#{test_app}/scripts/nested/simple.sh" => [nil, nil, nil, nil, 1, 1, nil, 0, nil, nil, 1],
     "#{test_app}/scripts/new\nline.sh" => [nil, nil, 1, nil, 2],

spec/test_app/scripts/function.sh

@@ -9,9 +9,13 @@ f2() {
     echo f2 # 1
 }
 
-__a_bc()
+__a-bc()
 {
-    echo __a_bc # 1
+    echo __a-bc # 1
+}
+
+put-team-key() {
+  echo put-team-key # 0
 }
 
 abc::def() {
@@ -20,5 +24,5 @@ abc::def() {
 
 f1 # 1
 f2 # 1
-__a_bc # 1
+__a-bc # 1
 abc::def # 1