3.1

3.1:

• Fix directly nested sedlex matches (@smuenzel, PR #117, fixes: #12)
• Use explicit stdlib in generated code (@hhugo, PR #122, fixes: #115)
• Preserve location of lexbuf (@hhugo, PR #118, fixes: #19)
• Don't use gen to consume channels (@hhugo, PR #124, fixes: #45)
• New expect_test testsuite (@hhugo, PR #124)
• Properly recognize malformed truncated input (@hhugo, PR #124)
• Raise Malformed instead of Invalid_arg (@hhugo, PR #126, fixes: #91)
• Updated unicode support to 15.0.0