Upgrade rust/crates/plotters-backend to 0.3.2

Test: make
Change-Id: I91a14dc3a6ebc67ea9f30f2b4f86619eae05b883
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
index 4b0f3cd..46b53e4 100644
--- a/.cargo_vcs_info.json
+++ b/.cargo_vcs_info.json
@@ -1,5 +1,5 @@
 {
   "git": {
-    "sha1": "c6b06516c13c2ab01854908bab6e59c004725353"
+    "sha1": "def8d8b4033af35963bc9b11cdb444cf99f91b5a"
   }
 }
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..5cde165
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
diff --git a/Cargo.toml b/Cargo.toml
index e511ae2..582dabc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@
 [package]
 edition = "2018"
 name = "plotters-backend"
-version = "0.3.0"
+version = "0.3.2"
 authors = ["Hao Hou <haohou302@gmail.com>"]
 description = "Plotters Backend API"
 homepage = "https://plotters-rs.github.io"
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index b2f0750..0d27003 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -1,6 +1,6 @@
 [package]
 name = "plotters-backend"
-version = "0.3.0"
+version = "0.3.2"
 authors = ["Hao Hou <haohou302@gmail.com>"]
 edition = "2018"
 license = "MIT"
diff --git a/METADATA b/METADATA
index 080b3f4..f2afc06 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/plotters-backend/plotters-backend-0.3.0.crate"
+    value: "https://static.crates.io/crates/plotters-backend/plotters-backend-0.3.2.crate"
   }
-  version: "0.3.0"
+  version: "0.3.2"
   license_type: NOTICE
   last_upgrade_date {
     year: 2021
-    month: 4
-    day: 1
+    month: 8
+    day: 9
   }
 }
diff --git a/src/rasterizer/line.rs b/src/rasterizer/line.rs
index 0f24b0a..7a646f4 100644
--- a/src/rasterizer/line.rs
+++ b/src/rasterizer/line.rs
@@ -6,7 +6,7 @@
     mut to: BackendCoord,
     style: &S,
 ) -> Result<(), DrawingErrorKind<DB::ErrorType>> {
-    if style.color().alpha == 0.0 {
+    if style.color().alpha == 0.0 || style.stroke_width() == 0 {
         return Ok(());
     }