rust: lock all major crate versions

To avoid surprises with dependencies bumping MSRV.

rust/Cargo.toml.in

@@ -19,32 +19,31 @@ debug-validate = []
 function-macro = []
 
 [dependencies]
-nom = "~ 5.1.1"
-bitflags = "1.0"
-byteorder = "1.3"
-uuid = "0.8"
-crc = "1.8"
-memchr = "2.2"
-num = "0.2"
-num-derive = "0.2"
-num-traits = "0.2"
-widestring = "0.4"
-flate2 = "1.0"
-brotli = "3.3.0"
+nom = "~5.1.1"
+bitflags = "~1.0.0"
+byteorder = "~1.4.2"
+uuid = "~0.8.0"
+crc = "~1.8.0"
+memchr = "~2.2.0"
+num = "~0.2.0"
+num-derive = "~0.2.0"
+num-traits = "~0.2.0"
+widestring = "~0.4.0"
+flate2 = "~1.0.19"
+brotli = "~3.3.0"
 
-der-parser = "4.0"
-kerberos-parser = "0.5"
-
-ntp-parser = "0.4"
-ipsec-parser = "0.5"
-snmp-parser = "0.6"
-tls-parser = "0.9"
-x509-parser = "0.6.5"
-libc = "0.2.67"
-sha2 = "0.9.2"
-digest = "0.9.0"
-sha-1 = "0.9.2"
-md-5 = "0.9.1"
+der-parser = "~4.0.0"
+kerberos-parser = "~0.5.0"
+ntp-parser = "~0.4.0"
+ipsec-parser = "~0.5.0"
+snmp-parser = "~0.6.0"
+tls-parser = "~0.9.0"
+x509-parser = "~0.6.5"
+libc = "~0.2.67"
+sha2 = "~0.9.2"
+digest = "~0.9.0"
+sha-1 = "~0.9.2"
+md-5 = "~0.9.1"
 
 [dev-dependencies]
-test-case = "1.0"
+test-case = "~1.1.0"