Add rbs for lib/lrama/options.rb #1132

Job	Run time
check-misc (head)	8s
check-misc (head)	8s
test-memory (head)	39s
test-memory (head)	39s
steep-check (head)	12s
steep-check (head)	12s
test-ruby (head, master)	5m 30s
test-ruby (head, master)	5m 30s
test-ruby (3.0, master)	5m 26s
test-ruby (3.0, master)	5m 26s
test-windows (head)	1m 55s
test-windows (head)	1m 55s
test-ruby (2.7, master)	43s
test-ruby (2.7, master)	43s
ruby-versions / Generate Ruby versions	2s
ruby-versions / Generate Ruby versions	2s
test (2.5)	23s
test (2.5)	23s
test (2.6)	24s
test (2.6)	24s
test (2.7)	23s
test (2.7)	23s
test (3.0)	12s
test (3.0)	12s
test (3.1)	12s
test (3.1)	12s
test (3.2)	13s
test (3.2)	13s
test (3.3)	10s
test (3.3)	10s
test (head)	10s
test (head)	10s
	33m 24s

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