add cataloger for rust crates from Cargo.lock files

Signed-off-by: Weston Steimel <weston.steimel@gmail.com>

test/integration/pkg_cases_test.go

@@ -184,4 +184,14 @@ var commonTestCases = []testCase{
 			"github.com/bmatcuk/doublestar": "v1.3.1",
 		},
 	},
+	{
+		name:        "find rust crates",
+		pkgType:     pkg.RustPkg,
+		pkgLanguage: pkg.Rust,
+		pkgInfo: map[string]string{
+			"memchr":        "2.3.3",
+			"nom":           "4.2.3",
+			"version_check": "0.1.5",
+		},
+	},
 }

test/integration/test-fixtures/image-pkg-coverage/rust/Cargo.lock

@@ -0,0 +1,25 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+
+[[package]]
+name = "memchr"
+version = "2.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
+
+[[package]]
+name = "nom"
+version = "4.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ad2a91a8e869eeb30b9cb3119ae87773a8f4ae617f41b1eb9c154b2905f7bd6"
+dependencies = [
+ "memchr",
+ "version_check",
+]
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
+