fix(deps): upgrade sqlparse to 0.6.0 for security fixes (#241)

Resolves multiple high/medium severity Dependabot alerts: quadratic CPU
consumption during tuple list reindentation and comment grouping,
ReDoS on dollar-quoted SQL literals, unbounded value materialization
in TokenList.__init__ before depth/token caps trigger, and SQL string
breakout via unescaped backslashes in generated Python/PHP snippets.

GHSA-cfqr-cjx5-5jcm, GHSA-prg7-hcfm-mfcr, GHSA-pwgv-4x5q-6m9f,
GHSA-f2ff-p2ww-7p4p, GHSA-3496-9g83-7v6x

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

Author: matrixise

requirements/dev.txt

@@ -189,7 +189,7 @@ soupsieve==2.8.3
     # via
     #   -c requirements/main.txt
     #   beautifulsoup4
-sqlparse==0.5.5
+sqlparse==0.6.0
     # via
     #   -c requirements/main.txt
     #   django

requirements/main.txt

@@ -157,7 +157,7 @@ six==1.17.0
     # via python-dateutil
 soupsieve==2.8.3
     # via beautifulsoup4
-sqlparse==0.5.5
+sqlparse==0.6.0
     # via django
 static3==0.7.0
     # via dj-static