Bump MSRV to 1.65

I don't know of any actual incompatibilities, but this is as far back
as we're willing to build CI images for.

Author: michaelkirk

.github/workflows/test.yml

@@ -51,7 +51,7 @@ jobs:
       matrix:
         container_image:
           # Minimum supported rust (MSRV)
-          - "georust/proj-ci:proj-9.3.1-rust-1.63"
+          - "georust/proj-ci:proj-9.3.1-rust-1.65"
           # Latest stable rust
           - "georust/proj-ci:proj-9.3.1-rust-1.74"
         features:
@@ -98,17 +98,17 @@ jobs:
         include:
           # Minimum supported rust (MSRV)
           - container:
-              image: georust/proj-ci:proj-9.3.1-rust-1.63
+              image: georust/proj-ci:proj-9.3.1-rust-1.65
               env:
                 _PROJ_SYS_TEST_EXPECT_BUILD_FROM_SRC: 0
             features: ""
           - container:
-              image: georust/proj-ci:proj-9.3.1-rust-1.63
+              image: georust/proj-ci:proj-9.3.1-rust-1.65
               env:
                 _PROJ_SYS_TEST_EXPECT_BUILD_FROM_SRC: 1
             features: "--features bundled_proj"
           - container:
-              image: georust/proj-ci-without-system-proj:proj-9.3.1-rust-1.63
+              image: georust/proj-ci-without-system-proj:proj-9.3.1-rust-1.65
               env:
                 _PROJ_SYS_TEST_EXPECT_BUILD_FROM_SRC: 1
             features: ""

Cargo.toml

@@ -11,7 +11,7 @@ keywords = ["proj", "projection", "osgeo", "geo"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 edition = "2018"
-rust-version = "1.63"
+rust-version = "1.65"
 
 [dependencies]
 proj-sys = { version = "0.23.1", path = "proj-sys" }

proj-sys/Cargo.toml

@@ -9,6 +9,7 @@ keywords = ["proj", "projection", "osgeo", "geo", "geospatial"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
 links = "proj"
+rust-version = "1.65"
 
 [dependencies]