Update crate g2gen

Author: bors

g2/ge/g2gen

@@ -5,3 +5,4 @@
 {"name":"g2gen","vers":"1.0.0","deps":[{"name":"g2poly","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"proc-macro2","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"quote","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"syn","req":"^1.0","features":["parsing"],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"2b3739628484df50bec1e86ffbe43015f90f66cd4b277d66ba9988090e69ff14","features":{},"yanked":false}
 {"name":"g2gen","vers":"1.0.1","deps":[{"name":"g2poly","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"proc-macro2","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"quote","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"syn","req":"^1.0","features":["parsing"],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"fc2c7625b2fc250dd90b63f7887a6bb0f7ec1d714c8278415bea2669ef20820e","features":{},"yanked":false}
 {"name":"g2gen","vers":"1.1.0","deps":[{"name":"g2poly","req":"^1.1","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"proc-macro2","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"quote","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"syn","req":"^2.0","features":["parsing","proc-macro"],"optional":false,"default_features":false,"target":null,"kind":"normal"}],"cksum":"dc3e32f911a41e073b8492473c3595a043e1369ab319a2dbf8c89b1fea06457c","features":{},"yanked":false,"rust_version":"1.61"}
+{"name":"g2gen","vers":"1.2.0","deps":[{"name":"g2poly","req":"^1.2","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"proc-macro2","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"quote","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"syn","req":"^2.0","features":["parsing","proc-macro"],"optional":false,"default_features":false,"target":null,"kind":"normal"}],"cksum":"39a8e3a10ca47bce6c3f36b5ed98a08636806e07793390a5bce8c2cab2eee309","features":{},"yanked":false,"rust_version":"1.61"}