Upgrade to indexmap 1.7, using hashbrown 0.11

Cargo.lock

@@ -1520,12 +1520,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "hashbrown"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
-
 [[package]]
 name = "hashbrown"
 version = "0.11.0"
@@ -1676,12 +1670,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.6.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55e2e4c765aa53a0424761bf9f41aa7a6ac1efa87238f59560640e27fca028f2"
+checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
 dependencies = [
  "autocfg",
- "hashbrown 0.9.1",
+ "hashbrown",
 ]
 
 [[package]]
@@ -4966,7 +4960,7 @@ dependencies = [
  "core",
  "dlmalloc",
  "fortanix-sgx-abi",
- "hashbrown 0.11.0",
+ "hashbrown",
  "hermit-abi",
  "libc",
  "miniz_oxide",