Proximity on Demand -- Typo

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import board
import adafruit_vcnl4020 as vcnl4020

sensor = vcnl4020.Adafruit_VCNL4020(board.I2C())

self._sensor.proximity_on_demand = True
AttributeError: 'Adafruit_VCNL4020' object has no attribute 'proximity_on_demand'

dir(sensor)
['class', 'init', 'module', 'qualname', 'dict', 'i2c_device', '_product_revision', 'proximity_rate', 'led_current', 'lux_rate', 'lux_averaging', '_enable', 'lux_enabled', 'proximity_enabled', 'selftimed_enabled', 'clear_interrupts', '_int_status_reg', 'interrupt_count', '_int_counts', '_interrupt_count', '_led_current', '_avg_samples', '_lux_averaging', '_lux_rates', '_lux_rate', 'proximity_frequency', '_proximity_frequencies', '_proximity_frequency', '_proximity_rates', '_proximity_rate', 'auto_offset_comp', '_command_reg', 'continuous_conversion', '_int_ctrl_reg', 'lux', 'lux_on_demand', 'lux_ready', 'proximity', 'promixity_on_demand', 'proximity_ready', 'low_threshold', 'high_threshold', 'proximity_interrupt', 'lux_interrupt', 'high_threshold_interrupt', 'low_threshold_interrupt']

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Line 100 of adafruit_vcnl4020.py