Update version to 0.9.0 and minimum Zig version to 0.15.1; refactor build configuration and array list initialization

Author: xarunoba

build.zig

@@ -4,16 +4,14 @@ pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
-    _ = b.addModule("env_struct", .{
+    const env_struct = b.addModule("env_struct", .{
         .root_source_file = b.path("src/env_struct.zig"),
         .target = target,
         .optimize = optimize,
     });
 
     const lib_unit_tests = b.addTest(.{
-        .root_source_file = b.path("src/env_struct.zig"),
-        .target = target,
-        .optimize = optimize,
+        .root_module = env_struct,
     });
 
     const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);

build.zig.zon

@@ -10,7 +10,7 @@
 
     // This is a [Semantic Version](https://semver.org/).
     // In a future version of Zig it will be used for package deduplication.
-    .version = "0.8.0",
+    .version = "0.9.0",
 
     // Together with name, this represents a globally unique package
     // identifier. This field is generated by the Zig toolchain when the
@@ -28,7 +28,7 @@
 
     // Tracks the earliest Zig version that the package considers to be a
     // supported use case.
-    .minimum_zig_version = "0.14.1",
+    .minimum_zig_version = "0.15.1",
 
     // This field is optional.
     // Each dependency must either provide a `url` and `hash`, or a `path`.

src/env_struct.zig

@@ -287,7 +287,7 @@ fn parseEnum(comptime E: type) fn ([]const u8, std.mem.Allocator) anyerror!E {
 fn parseStringArray(raw: []const u8, allocator: std.mem.Allocator) ![][]const u8 {
     if (raw.len == 0) return &[_][]const u8{};
 
-    var result = std.ArrayList([]const u8).init(allocator);
+    var result = std.array_list.Managed([]const u8).init(allocator);
     defer result.deinit();
 
     var iter = std.mem.splitScalar(u8, raw, ',');