Add missing tests

Author: kgryte

lib/node_modules/@stdlib/random/base/bernoulli/test/test.factory.js

@@ -449,6 +449,7 @@ tape( 'attached to the returned function is a method to serialize the generator
 	t.equal( o.type, 'PRNG', 'has property' );
 	t.equal( o.name, bernoulli.NAME, 'has property' );
 	t.deepEqual( o.state, typedarray2json( bernoulli.state ), 'has property' );
+	t.deepEqual( o.params, [], 'has property' );
 
 	bernoulli = factory( 0.5 );
 	o = bernoulli.toJSON();

lib/node_modules/@stdlib/random/base/beta/test/test.factory.js

@@ -655,6 +655,7 @@ tape( 'attached to the returned function is a method to serialize the generator
 	t.equal( o.type, 'PRNG', 'has property' );
 	t.equal( o.name, beta.NAME, 'has property' );
 	t.deepEqual( o.state, typedarray2json( beta.state ), 'has property' );
+	t.deepEqual( o.params, [], 'has property' );
 
 	beta = factory( 1.0, 2.0 );
 	o = beta.toJSON();

lib/node_modules/@stdlib/random/base/betaprime/test/test.factory.js

@@ -514,6 +514,7 @@ tape( 'attached to the returned function is a method to serialize the generator
 	t.equal( o.type, 'PRNG', 'has property' );
 	t.equal( o.name, betaprime.NAME, 'has property' );
 	t.deepEqual( o.state, typedarray2json( betaprime.state ), 'has property' );
+	t.deepEqual( o.params, [], 'has property' );
 
 	betaprime = factory( 0.1, 0.5 );
 	o = betaprime.toJSON();

lib/node_modules/@stdlib/random/base/binomial/test/test.factory.js

@@ -555,6 +555,7 @@ tape( 'attached to the returned function is a method to serialize the generator
 	t.equal( o.type, 'PRNG', 'has property' );
 	t.equal( o.name, binomial.NAME, 'has property' );
 	t.deepEqual( o.state, typedarray2json( binomial.state ), 'has property' );
+	t.deepEqual( o.params, [], 'has property' );
 
 	binomial = factory( 10, 0.5 );
 	o = binomial.toJSON();