PHP 7 Compatibility

I installed PHP7.1 and ran the compatibility checker. The plugin is compatible but throws a number of warnings.

ssh-sftp-updater-support/class-wp-filesystem-ssh2.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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32 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Math/BigInteger.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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254 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Net/SSH2.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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857 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Net/SFTP.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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291 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Crypt/Hash.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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154 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Crypt/RC4.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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165 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Crypt/Base.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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497 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Crypt/Rijndael.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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286 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Crypt/TripleDES.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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201 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /usr/home/schmehl/Sites/blog.vvfh.org/wp-content/plugins/ssh-sftp-updater-support/phpseclib/Crypt/RSA.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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487 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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