Update crate g2poly

Author: bors

g2/po/g2poly

@@ -5,3 +5,4 @@
 {"name":"g2poly","vers":"1.0.0","deps":[],"cksum":"a9bd7328d5d3216889d176c218d991c0fd848d1ffe1c81d96faf1a742db38212","features":{},"yanked":false}
 {"name":"g2poly","vers":"1.0.1","deps":[],"cksum":"af6a86e750338603ea2c14b1c0bfe58cd61f87ca67a0021d9334996024608e12","features":{},"yanked":false}
 {"name":"g2poly","vers":"1.1.0","deps":[],"cksum":"0fd8b261ccf00df8c5cc60c082bb7d7aa64c33a433cfcc091ca244326c924b2c","features":{},"yanked":false}
+{"name":"g2poly","vers":"1.2.0","deps":[],"cksum":"feebd4c1b1833bea3876ecc7c2f84520818f86de7b4c3b82e064f68ea1d8cdaa","features":{},"yanked":false,"rust_version":"1.60"}