Update to latest version of SQLite3 3.22.0 #326

Upgrade to bindgen 0.32
Add a shell script to upgrade bundled SQLite version
Upgrade bundle SQLite to 3.22.0
Upgrade libsqlite3-sys version to 0.9.2

libsqlite3-sys/upgrade.sh

@@ -0,0 +1,26 @@
+SCRIPT_DIR=$(cd "$(dirname "$_")" && pwd)
+echo $SCRIPT_DIR
+cd $SCRIPT_DIR
+SQLITE3_LIB_DIR=$SCRIPT_DIR/sqlite3
+
+# Download and extract amalgamation
+SQLITE=sqlite-amalgamation-3220000
+curl -O http://sqlite.org/2018/$SQLITE.zip
+unzip -p $SQLITE.zip $SQLITE/sqlite3.c > $SQLITE3_LIB_DIR/sqlite3.c
+unzip -p $SQLITE.zip $SQLITE/sqlite3.h > $SQLITE3_LIB_DIR/sqlite3.h
+unzip -p $SQLITE.zip $SQLITE/sqlite3ext.h > $SQLITE3_LIB_DIR/sqlite3ext.h
+rm -f $SQLITE.zip
+
+# Regenerate bindgen file
+rm -f $SQLITE3_LIB_DIR/bindgen_bundled_version.rs
+SQLITE3_INCLUDE_DIR=$SQLITE3_LIB_DIR
+cargo update
+# Just to make sure there is only one bingen.rs file in target dir
+cargo clean
+cargo build --features "buildtime_bindgen" --no-default-features
+find $SCRIPT_DIR/target -type f -name bindgen.rs -exec cp {} $SQLITE3_LIB_DIR/bindgen_bundled_version.rs \;
+# Sanity check
+cd $SCRIPT_DIR/..
+cargo update
+cargo test --features "backup blob chrono functions limits load_extension serde_json trace bundled"
+echo 'You should increment the version in libsqlite3-sys/Cargo.toml'