SQLite integers can host bigints, fix #227.

pgloader.1

@@ -2400,6 +2400,9 @@ Numbers:
 type tinyint to smallint
 .
 .IP "\(bu" 4
+type integer to bigint
+.
+.IP "\(bu" 4
 type float to float using float\-to\-string
 .
 .IP "\(bu" 4

pgloader.1.md

@@ -1960,6 +1960,7 @@ When migrating from SQLite the following Casting Rules are provided:
 Numbers:
 
   - type tinyint to smallint
+  - type integer to bigint
 
   - type float to float   using float-to-string
   - type real to real     using float-to-string

src/sources/sqlite/sqlite-cast-rules.lisp

@@ -16,6 +16,7 @@
     (:source (:type "clob")      :target (:type "text" :drop-typemod t))
 
     (:source (:type "tinyint") :target (:type "smallint"))
+    (:source (:type "integer") :target (:type "bigint"))
 
     (:source (:type "float") :target (:type "float")
              :using pgloader.transforms::float-to-string)