pwiz foreign key regex for sqlite
Recent changes to the definition of foreign keys has caused pwiz to break when introspecting peewee-created sqlite tables.

Here is the table definition from peewee 2.1.6:

``` sql
CREATE TABLE "fkpk" (
    "col_types_id" INTEGER NOT NULL PRIMARY KEY REFERENCES "coltypes" ("f11") 
);
```

Here it is for 2.2.0, broken:

``` sql
CREATE TABLE "fkpk" (
    "col_types_id" INTEGER NOT NULL PRIMARY KEY, 
    FOREIGN KEY ("col_types_id") REFERENCES "coltypes" ("f11")
);
```
