Small update to publish source maintenance.

More informations on latest changes Meta-Press.es website : https://www.meta-press.es/journal/2025/v1.9_speed_improvement_CLI_books.html

v1.9 :
- major speed improvement leveraging microTasks and multi-threading
- ergonomy improvements thanks to Alexiane Sénéchaud contributions (and more to come)
- new "book" result type, to target online ePub libraries
- creation of a command line interface via Deno

More informations on Meta-Press.es website : https://www.meta-press.es/journal/2025/v1.9_speed_improvement_CLI_books.html

v1.9 :
- major speed improvement leveraging microTasks and multi-threading
- ergonomy improvements thanks to Alexiane Sénéchaud contributions (and more to come)
- new "book" result type, to target online ePub libraries
- creation of a command line interface via Deno

More informations on Meta-Press.es website : https://www.meta-press.es/en/journal/2025/v1.9_speed_improvement_CLI_books.html

v1.9 :
- major speed improvement leveraging multi-threading
- creation of a command line interface via Deno
- ergonomy improvements thanks to Alexiane Sénéchaud contributions (and more to come)
- new "book" result type, to target online ePub libraries

More informations on Meta-Press.es website : https://www.meta-press.es/en/journal/2025/v1.9_speed_improvement_CLI_books.html

Simplify the regular expression used to separate words in responses of sources showing search term extracts in their results.