Update macrotest

.github/.cspell/project-dictionary.txt

@@ -1,6 +1,5 @@
 compiletest
 expandtest
 metavariables
-prettyplease
 reborrow
 wontfix

.github/dependabot.yml

@@ -9,9 +9,5 @@ updates:
     ignore:
       # For test on MSRV.
       - dependency-name: once_cell
-      - dependency-name: proc-macro2
-      - dependency-name: quote
-      - dependency-name: serde
-      - dependency-name: toml
       - dependency-name: trybuild
     labels: []

.github/workflows/ci.yml

@@ -69,10 +69,6 @@ jobs:
       - uses: taiki-e/install-action@cargo-minimal-versions
       - uses: taiki-e/install-action@cargo-careful
         if: startsWith(matrix.rust, 'nightly')
-      - uses: taiki-e/cache-cargo-install-action@v1
-        with:
-          tool: cargo-expand
-        if: startsWith(matrix.rust, 'nightly')
       - run: cargo test --all --all-features
       - run: cargo careful test --all --all-features
         env:

Cargo.toml

@@ -25,17 +25,10 @@ members = [
 doc-scrape-examples = false
 
 [dev-dependencies]
-macrotest = "1.0.9"
+macrotest = { git = "https://github.com/taiki-e/macrotest.git", branch = "dev-old-msrv" } # 2021 edition support + lower MSRV + no cargo-expand
 rustversion = "1"
 static_assertions = "1"
 trybuild = "=1.0.67"
 
 # For test on MSRV.
 once_cell = "=1.14"
-proc-macro2 = "=1.0.65"
-quote = "=1.0.30"
-serde = "=1.0.156"
-toml = "=0.5.9"
-
-[patch.crates-io]
-prettyplease = { git = "https://github.com/taiki-e/prettyplease.git", branch = "dev" } # lower MSRV