Restore hard dependency on php7.0-fpm.

Yunohost already takes care to auto-patch configs to use 7.3 when needed.

manifest.json

@@ -19,7 +19,7 @@
   },
   "services": [
     "nginx",
-    "php-fpm"
+    "php7.0-fpm"
   ],
   "arguments": {
     "install": [

scripts/_common.sh

@@ -3,7 +3,7 @@
 # Common variables and helpers
 #
 
-pkg_dependencies="php-fpm sipcalc dnsutils openvpn curl fake-hwclock"
+pkg_dependencies="php7.0-fpm sipcalc dnsutils openvpn curl fake-hwclock"
 
 service_name="ynh-vpnclient"
 service_checker_name=$service_name"-checker"