revert to llvm-12 as used by github CI

2 files changed, 88 insertions, 5 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 429c6f7..b0942b0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -39,9 +39,9 @@ dependencies = [
 
 [[package]]
 name = "llvm-sys"
-version = "140.0.3"
+version = "120.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b9eda9cc6f86672152125b1e112d66ab8797b7917fb202e2faee912caa76413"
+checksum = "a1c9655eec036faf512507746ce70765bda72ed98e52b4328f0d7b93e970c6d8"
 dependencies = [
  "cc",
  "lazy_static",
@@ -57,6 +57,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
+name = "pest"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb779fcf4bb850fbbb0edc96ff6cf34fd90c4b1a112ce042653280d9a7364048"
+dependencies = [
+ "thiserror",
+ "ucd-trie",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7bd7356a8122b6c4a24a82b278680c73357984ca2fc79a0f9fa6dea7dced7c58"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
 name = "regex"
 version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -75,6 +103,61 @@ checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
 [[package]]
 name = "semver"
-version = "1.0.14"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f301af10236f6df4160f7c3f04eec6dbc70ace82d23326abad5edee88801c6b6"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00b0bef5b7f9e0df16536d3961cfb6e84331c065b4066afb39768d0e319411f7"
+dependencies = [
+ "pest",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52205623b1b0f064a4e71182c3b18ae902267282930c6d5462c91b859668426e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c53f98874615aea268107765aa1ed8f6116782501d18e53d08b471733bea6c85"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8b463991b4eab2d801e724172285ec4195c650e8ec79b149e6c2a8e6dd3f783"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "ucd-trie"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e79c4d996edb816c91e4308506774452e55e95c3c9de07b6729e17e15a5ef81"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
+checksum = "dcc811dc4066ac62f84f11307873c4850cb653bfa9b1719cee2bd2204a4bc5dd"
diff --git a/Cargo.toml b/Cargo.toml
index b3fa950..abe6ee5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,4 +5,4 @@ edition = "2018"
 
 [dependencies]
 libc     = "0.2"
-llvm-sys = {version = "140.0", features = ["strict-versioning"]}
+llvm-sys = {version = "120.0", features = ["strict-versioning"]}