Revert precompile bump and minimum elixir version bump

I can not drop the minimum support of 1.16 yet, until we get the
otp-build project using later versions of OTP.

See: cocoa-xu/otp-build#4
Reverts: bf9a21e
Partially-Reverts: 69ebf86

Author: warmwaffles

.github/workflows/android-precompile.yml

@@ -31,9 +31,8 @@ jobs:
             os: linux
             abi: androideabi
         job:
-          - {otp: "27.3.4", elixir: "1.18"}
-          - {otp: "28.5.0", elixir: "1.19"}
-          - {otp: "29.0.2", elixir: "1.20"}
+          - {otp: "27", elixir: "1.17"}
+          - {otp: "25", elixir: "1.16"}
 
     name: Android ${{ matrix.target.triplet }} - OTP ${{ matrix.job.otp }} - Elixir ${{ matrix.job.elixir }}
     steps:

.github/workflows/linux-precompile.yml

@@ -25,9 +25,8 @@ jobs:
     strategy:
       matrix:
         job:
-          - {otp: "27.3.4", elixir: "1.18"}
-          - {otp: "28.5.0", elixir: "1.19"}
-          - {otp: "29.0.2", elixir: "1.20"}
+          - {otp: "27.1.1", elixir: "1.17"}
+          - {otp: "25.3.2.14", elixir: "1.16"}
 
     name: Linux armv7l - OTP ${{ matrix.job.otp }} - Elixir ${{ matrix.job.elixir }}
     steps:
@@ -91,9 +90,8 @@ jobs:
           - aarch64
           - riscv64
         job:
-          - {otp: "27", elixir: "1.18"}
-          - {otp: "28", elixir: "1.19"}
-          - {otp: "29", elixir: "1.20"}
+          - {otp: "27", elixir: "1.17"}
+          - {otp: "25", elixir: "1.16"}
 
     name: Linux ${{ matrix.arch }} - OTP ${{ matrix.job.otp }} - Elixir ${{ matrix.job.elixir }}
     steps:

.github/workflows/macos-precompile.yml

@@ -22,9 +22,8 @@ jobs:
           - x86_64-apple-darwin
           - arm64-apple-darwin
         job:
-          - {otp: "27.3.4", elixir: "1.18"}
-          - {otp: "28.5.0", elixir: "1.19"}
-          - {otp: "29.0.2", elixir: "1.20"}
+          - {otp: "27.0.1", elixir: "1.17.2"}
+          - {otp: "25.3.2.13", elixir: "1.16.3"}
 
     name: Mac ${{ matrix.arch }} - OTP ${{ matrix.job.otp }} - Elixir ${{ matrix.job.elixir }}
     steps:

mix.exs

@@ -7,7 +7,7 @@ defmodule Exqlite.MixProject do
     [
       app: :exqlite,
       version: @version,
-      elixir: "~> 1.18",
+      elixir: "~> 1.16",
       compilers: [:elixir_make] ++ Mix.compilers(),
       make_targets: ["all"],
       make_clean: ["clean"],