fix 1.48.0 build

Author: RCasatta

contrib/test.sh

@@ -4,12 +4,12 @@ FEATURES="serde"
 
 # Pin dependencies as required if we are using MSRV toolchain.
 if cargo --version | grep "1\.48"; then
-    cargo update -p once_cell --precise 1.13.1
-    cargo update -p quote --precise 1.0.28
-    cargo update -p proc-macro2 --precise 1.0.63
     cargo update -p serde_json --precise 1.0.99
     # 1.0.157 uses syn 2.0 which requires edition 2018
     cargo update -p serde --precise 1.0.156
+    cargo update -p once_cell --precise 1.13.1
+    cargo update -p quote --precise 1.0.28
+    cargo update -p proc-macro2 --precise 1.0.63
     cargo update -p serde_test --precise 1.0.156
 
     cargo update -p log --precise 0.4.18