Use smaller enums

Found by clang-tidy

In src/taginfo-impl.hpp we can't use a smaller type, because we use bool
operators on those values which promotes them to ints which leads to
other problems.

Author: joto

src/output-pgsql.hpp

@@ -23,12 +23,13 @@
 #include "tagtransform.hpp"
 
 #include <array>
+#include <cstdint>
 #include <memory>
 
 class output_pgsql_t : public output_t
 {
 public:
-    enum table_id
+    enum table_id : std::uint8_t
     {
         t_point = 0,
         t_line,

src/taginfo-impl.hpp

@@ -19,7 +19,7 @@
 #include <utility>
 #include <vector>
 
-enum column_flags : unsigned int
+enum column_flags : unsigned int // NOLINT(performance-enum-size)
 {
     FLAG_POLYGON = 1, /* For polygon table */
     FLAG_LINEAR = 2,  /* For lines table */