Bump proc-macro2 from 0.4.30 to 1.0.95

Bumps [proc-macro2](https://github.com/dtolnay/proc-macro2) from 0.4.30 to 1.0.95.
- [Release notes](https://github.com/dtolnay/proc-macro2/releases)
- [Commits](dtolnay/proc-macro2@0.4.30...1.0.95)

---
updated-dependencies:
- dependency-name: proc-macro2
  dependency-version: 1.0.95
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -48,7 +48,7 @@ env_logger = "0.9"                               # MIT/Apache-2.0
 yansi = "0.5"                                    # MIT/Apache-2.0
 atty = "0.2"                                     # MIT
 quote = "0.6"                                    # MIT/Apache-2.0
-proc-macro2 = "0.4"                              # MIT/Apache-2.0
+proc-macro2 = "1.0"                              # MIT/Apache-2.0
 petgraph = "0.7"                                 # MIT/Apache-2.0
 mopa = "0.2"                                     # MIT/Apache-2.0
 syn = { version = "0.15", features = ["full"] }  # MIT/Apache-2.0