Update NEWS, set version number to 0.7.0

Author: hsonne

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: kwb.db
 Title: Functions supporting data base access
-Version: 0.6.0
+Version: 0.7.0
 Authors@R: 
     c(person(given = "Hauke",
              family = "Sonnenberg",

NEWS.md

@@ -1,3 +1,7 @@
+# [kwb.db 0.7.0](https://github.com/KWB-R/kwb.db/releases/tag/v0.7.0) <small>2023-09-25</small>
+
+* Add and export `read_schemata()`, `read_relations()`, `merge_relations()`
+
 # [kwb.db 0.6.0](https://github.com/KWB-R/kwb.db/releases/tag/v0.6.0) <small>2021-07-07</small>
 
 * `getDatabaseSchema()`: add arguments "tableNames", "tableTypes"