upgrade sqlite to 3.15, enable FTS4, FTS5

deps/common-sqlite.gypi

 {
   'variables': {
-      'sqlite_version%':'3090100',
+      'sqlite_version%':'3150000',
       "toolset%":'',
   },
   'target_defaults': {

deps/sqlite3.gyp

@@ -80,6 +80,8 @@
         'defines': [
           'SQLITE_THREADSAFE=1',
           'SQLITE_ENABLE_FTS3',
+          'SQLITE_ENABLE_FTS4',
+          'SQLITE_ENABLE_FTS5',
           'SQLITE_ENABLE_JSON1',
           'SQLITE_ENABLE_RTREE'
         ],
@@ -92,6 +94,8 @@
         '_REENTRANT=1',
         'SQLITE_THREADSAFE=1',
         'SQLITE_ENABLE_FTS3',
+        'SQLITE_ENABLE_FTS4',
+        'SQLITE_ENABLE_FTS5',
         'SQLITE_ENABLE_JSON1',
         'SQLITE_ENABLE_RTREE'
       ],