requirements: Update flattentool and cove libs

requirements.txt

@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile with Python 3.11
 # by the following command:
 #
-#    pip-compile requirements.in
+#    pip-compile
 #
 -e git+https://github.com/OpenDataServices/bdd-tester.git@e1a1a578e28222904f3f1567409b068222ec02e6#egg=bdd-tester
     # via -r requirements.in
@@ -26,9 +26,7 @@ bleach==6.0.0
 btrees==5.0
     # via zodb
 cached-property==1.5.2
-    # via
-    #   -r requirements.in
-    #   libcove
+    # via -r requirements.in
 cattrs==22.2.0
     # via requests-cache
 certifi==2022.12.7
@@ -62,12 +60,10 @@ django-bootstrap3==22.2
 django-debug-toolbar==3.8.1
     # via -r requirements.in
 django-environ==0.9.0
-    # via
-    #   -r requirements.in
-    #   libcoveweb
+    # via -r requirements.in
 et-xmlfile==1.1.0
     # via openpyxl
-flattentool==0.20.1
+flattentool==0.25.0
     # via
     #   -r requirements.in
     #   libcove
@@ -88,11 +84,11 @@ jsonschema==3.2.0
     # via
     #   -r requirements.in
     #   libcove
-libcove==0.29.0
+libcove==0.31.0
     # via
     #   -r requirements.in
     #   libcoveweb
-libcoveweb==0.26.0
+libcoveweb==0.30.4
     # via -r requirements.in
 lxml==4.9.2
     # via