use packaged dependencies

- add base as additional dependency for tests because of Errors test (as there, the compiler is invoked directly)

ragconnect.tests/build.gradle

@@ -44,6 +44,7 @@ configurations {
 
 dependencies {
     ragconnect project(':ragconnect.base')
+    testImplementation project(':ragconnect.base')
 
     implementation group: 'org.jastadd', name: 'jastadd2', version: '2.3.5-dresden-5'
     relast group: 'org.jastadd', name: 'relast', version: "0.3.0-137"