Update to protobuf ~> 0.14 (#47)

* remove googleapis submodule

* update deps

* remove protobuf_generate

* regenerate protos

* match grpc versions

* TEMP: use un-versioned fix

* add trailing line

* update protobuf

* re-add newline at end

* update protobuf

Author: ianko

.gitmodules

@@ -1,2 +1,2 @@
-elixir 1.15.7-otp-25
-erlang 25.1.1
+elixir 1.15.7-otp-26
+erlang 26.1.2

.tool-versions

@@ -1,2 +1,2 @@
-elixir 1.15.7-otp-25
-erlang 25.1.1
+elixir 1.15.7-otp-26
+erlang 26.1.2

examples/helloworld/.tool-versions

@@ -1,17 +1,7 @@
 #!/bin/bash
 
-PROTOS=("
-    priv/protos/helloworld.proto
-")
-
-for file in $PROTOS; do
-  mix protobuf.generate \
-    --output-path=./lib/protos \
-    --include-docs=true \
-    --generate-descriptors=true \
-    --include-path=priv/protos/ \
-    --include-path=./priv/protos/googleapis \
-    --plugin=ProtobufGenerate.Plugins.GRPC \
-    --one-file-per-module \
-    $file
-done
+protoc -I priv/protos \
+  --elixir_out=plugins=grpc:./lib/protos \
+  --elixir_opt=include_docs=true \
+  --elixir_out=plugins=grpc,gen_descriptors=true:lib/protos \
+  priv/protos/*.proto