Build some extensions for PHP 8 (#95)

* Build some extensions on PHP8

* Removed php8 from some more extensions

Author: Nyholm

.travis.yml

@@ -21,23 +21,23 @@ env:
   - LAYER=amqp PHP="73 74"
   - LAYER=blackfire PHP="73 74"
   - LAYER=cassandra PHP="73 74"
-  - LAYER=ds PHP="73 74"
-  - LAYER=gd PHP="73 74"
-  - LAYER=gmp PHP="73 74"
-  - LAYER=igbinary PHP="73 74"
-  - LAYER=ldap PHP="73 74"
-  - LAYER=mailparse PHP="73 74"
+  - LAYER=ds PHP="73 74 80"
+  - LAYER=gd PHP="73 74 80"
+  - LAYER=gmp PHP="73 74 80"
+  - LAYER=igbinary PHP="73 74 80"
+  - LAYER=ldap PHP="73 74 80"
+  - LAYER=mailparse PHP="73 74 80"
   - LAYER=mongodb PHP="73 74"
   - LAYER=msgpack PHP="73 74"
-  - LAYER=odbc-snowflake PHP="73 74"
-  - LAYER=pcov PHP="73 74"
-  - LAYER=pgsql PHP="73 74"
-  - LAYER=redis PHP="73 74"
+  - LAYER=odbc-snowflake PHP="73 74 80"
+  - LAYER=pcov PHP="73 74 80"
+  - LAYER=pgsql PHP="73 74 80"
+  - LAYER=redis PHP="73 74 80"
   - LAYER=scrypt PHP="73 74"
   - LAYER=sqlsrv PHP="73 74"
-  - LAYER=uuid PHP="73 74"
+  - LAYER=uuid PHP="73 74 80"
   - LAYER=xdebug PHP="73 74"
-  - LAYER=yaml PHP="73 74"
+  - LAYER=yaml PHP="73 74 80"
 
 before_install:
   - |