chore: autogenerate latest version sql

Author: soedirgo

Makefile

@@ -1,4 +1,6 @@
 EXTENSION = pg_net
+EXTVERSION = 0.2
+
 DATA = $(wildcard sql/*--*.sql)
 
 TESTS = $(wildcard test/sql/*.sql)
@@ -8,6 +10,13 @@ REGRESS_OPTS = --use-existing --inputdir=test
 MODULE_big = pg_net
 OBJS = src/worker.o
 
+all: sql/$(EXTENSION)--$(EXTVERSION).sql
+
+sql/$(EXTENSION)--$(EXTVERSION).sql: sql/$(EXTENSION).sql
+	cp $< $@
+
+EXTRA_CLEAN = sql/$(EXTENSION)--$(EXTVERSION).sql
+
 PG_CONFIG = pg_config
 SHLIB_LINK = -lcurl