added sqlite3 database format (#66)

Author: jjf404

src/index.spec.ts

@@ -294,6 +294,12 @@ describe("Tests the public API", () => {
     });
   })
 
+  it("detects sqlite (SQLite 3 database file)", () => {
+	  const file = getBytes("a.sqlite")
+	  const result = filetypemime(file);
+	  expect(result).toContain("application/vnd.sqlite3");
+  });
+  
   it("detects pdf (Libreoffice export)", () => {
     // File created using libreoffice writter export to pdf
     const file = getBytes("a.pdf");

src/model/pattern-tree.ts

@@ -1341,6 +1341,18 @@ add("Mach-O", ["0xFE", "0xED", "0xFA", "0xCF"], {
   extension: "elf",
 });
 
+add("sqlite", ["0x53","0x51","0x4C","0x69","0x74","0x65","0x20","0x66","0x6F","0x72","0x6D","0x61","0x74","0x20","0x33","0x00"],
+{
+	mime: "application/vnd.sqlite3",
+	extension: ".sqlite",
+});
+
+add("sqlite", ["0x53","0x51","0x4C","0x69","0x74","0x65","0x20","0x66","0x6F","0x72","0x6D","0x61","0x74","0x20","0x33","0x00"],
+{
+	mime: "application/vnd.sqlite3",
+	extension: ".sqlite3",
+});
+
 add(
   "EML",
   ["0x52", "0x65", "0x63", "0x65", "0x69", "0x76", "0x65", "0x64", "0x3A"],