pwiz foreign key regex for sqlite

[coleifer]

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:

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

Here it is for 2.2.0, broken:

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