go: re-do the entire thing

This is a mega-change, but attempting to split this up further is
probably not worth the effort.

Summary:

1. Bump up bazel, rules_go, and others.
2. Switch to new go target naming (bye bye go_default_library)
3. Move go deps to go.mod/go.sum, use make gazelle generate from that
4. Bump up Python deps a bit

And also whatever was required to actually get things to work - loads of
small useless changes.

Tested to work on NixOS and Ubuntu 20.04:

   $ bazel build //...
   $ bazel test //...

Change-Id: I8364bdaa1406b9ae4d0385a6b607f3e7989f98a9
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1583
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/hswaw/laserproxy/BUILD.bazel b/hswaw/laserproxy/BUILD.bazel
index ca8bfb1..0d3c711 100644
--- a/hswaw/laserproxy/BUILD.bazel
+++ b/hswaw/laserproxy/BUILD.bazel
@@ -1,7 +1,7 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
 
 go_library(
-    name = "go_default_library",
+    name = "laserproxy_lib",
     srcs = [
         "locker.go",
         "main.go",
@@ -10,14 +10,14 @@
     importpath = "code.hackerspace.pl/hscloud/hswaw/laserproxy",
     visibility = ["//visibility:private"],
     deps = [
-        "//go/mirko:go_default_library",
-        "//hswaw/laserproxy/tpl:go_default_library",
-        "@com_github_golang_glog//:go_default_library",
+        "//go/mirko",
+        "//hswaw/laserproxy/tpl",
+        "@com_github_golang_glog//:glog",
     ],
 )
 
 go_binary(
     name = "laserproxy",
-    embed = [":go_default_library"],
+    embed = [":laserproxy_lib"],
     visibility = ["//visibility:public"],
 )