update composer dependencies

remove phpunit script from composer

added new direction 'changing'

closes #18

updated php-sap/interfaces to v5

fix namespace of RemoteApiTest

add xdebug.mode = coverage as suggested by the error message #10

remove php5 from travis and add 7.3 and 7.4

update php-sap/datetime to v1.2.3

V3 (#5)

* update to interface 2.x dev and all other packages as well

* issue #2 Removed parameter from invoke() and add getParams() methods.

Updated tests too.

* update interfaces (v2.x)

* add API element, value struct and table classes with their tests

* replace config key strings with JSON_* constants from interfaces and add jsonDecode() methods

* remove PHP 5.5 from travis list

* fix element and value test coverage.

Esoteric fix to the problem, that Api/ValueTest.php and
Api/ElementTest.php weren't called by phpunit.

* add remote API class

* fix #4 Added typecheck before calling addMember().

* add getApi() and setApi() to AbstractFunction and AbstractRemoteFunction classes

* introduce new element types

* use API definition to validate invoke parameters

* replace class paths with import

* rename constant HEX2BIN to HEXBIN

* add missing comment

* add tables to expected input params

* Trim hex-encoded return values before decoding to remove any NULLs.

* remote AbstractRemoteFunctionCall

* adapt configuration classes to newest interfaces

* Updated composer requirement php-sap/interfaces.
* Removed classes implementing the v1 configuration interfaces and their
tests.
* Created v2 configuration interfaces and their tests.

* remove file comments

* update connection class and its test to new connection interface

* composer update

* adapt exceptions to v2 interface

* update commons to v2 api

* update to latest version of interface and adapt some comments

* change config from private to protected

* add getParam() method

* replace Interfaces when classes are safe

* remove typecasting from RemoteApi

* remove superfluous use

* allow underlines and dashes in key names

* mandatory config settings now throw exception while optional return null

* update composer php-sap/interfaces

* adapt readme to v2 interfaces

* update to interfaces v2 and set supported PHP versions

* remove sudo from travis config and add os linux

remove connection pool