[fix] Avoid to remove a apt package accidentally (#292)

* [fix] Avoid to remove a apt package accidentally
* [fix] No need --no-remove option with apt update cmd

data/helpers.d/package

@@ -43,7 +43,7 @@ ynh_package_update() {
 # usage: ynh_package_install name [name [...]]
 # | arg: name - the package name to install
 ynh_package_install() {
-    ynh_apt -o Dpkg::Options::=--force-confdef \
+    ynh_apt --no-remove -o Dpkg::Options::=--force-confdef \
             -o Dpkg::Options::=--force-confold install $@
 }