pull, add-environment: don't mangle bools when rewriting .skeema

Whenever an existing .skeema option file is being rewritten during execution
of `skeema pull` (e.g. due to change in flavor) or `skeema add-environment`,
previously any boolean option values in the file would be mangled in a
confusing way. The options still worked properly but were hard to read;
enabled bool options would be set to a value of 1, and disabled bool options
would be set to an empty string.

This commit updates the mybase dep to fix this problem. Now bool options are
written in their canonical format: "foo" to enable, "skip-foo" to disable, no
equals sign or value present in either case.

README.md

@@ -66,7 +66,7 @@ Support for partitioned tables generously sponsored by [Etsy](https://www.etsy.c
 
 ## License
 
-**Copyright 2020 Skeema LLC**
+**Copyright 2021 Skeema LLC**
 
 ```text
 Licensed under the Apache License, Version 2.0 (the "License");

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/nozzle/throttler v0.0.0-20180817012639-2ea982251481
 	github.com/opencontainers/runc v1.0.0-rc5 // indirect
 	github.com/sirupsen/logrus v1.4.2
-	github.com/skeema/mybase v1.0.12-0.20201218182149-9bf088e98525
+	github.com/skeema/mybase v1.0.13
 	github.com/skeema/tengo v0.9.7-0.20201215220818-6707a59a4c0f
 	golang.org/x/lint v0.0.0-20190409202823-959b441ac422
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e

go.sum

@@ -128,8 +128,8 @@ github.com/sirupsen/logrus v1.0.4-0.20170822132746-89742aefa4b2/go.mod h1:pMByvH
 github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
 github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
-github.com/skeema/mybase v1.0.12-0.20201218182149-9bf088e98525 h1:eBtHRmy1iTx3p5mRqExr3jnntQu92D8rUXzJNsyIpxQ=
-github.com/skeema/mybase v1.0.12-0.20201218182149-9bf088e98525/go.mod h1:QIVXHvABKRem2FHkOv5lP8uQlQyc2x9GV4vIqq6tBcY=
+github.com/skeema/mybase v1.0.13 h1:0wO6MyVexyvyRzghOaYpJaHnqoGbrTETpzeK0+W47Kk=
+github.com/skeema/mybase v1.0.13/go.mod h1:QIVXHvABKRem2FHkOv5lP8uQlQyc2x9GV4vIqq6tBcY=
 github.com/skeema/tengo v0.9.7-0.20201215220818-6707a59a4c0f h1:8yODpzURNS0s6CH0AyxcWzJ3ChPrfejNTUcU9sSNDbI=
 github.com/skeema/tengo v0.9.7-0.20201215220818-6707a59a4c0f/go.mod h1:OXoEN3BZgDYLGfsNZEQrHWYWTYxI4/8dOVjGHaXug2k=
 github.com/spf13/cobra v0.0.2-0.20171109065643-2da4a54c5cee/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=

vendor/modules.txt

@@ -98,7 +98,7 @@ github.com/pmezard/go-difflib/difflib
 # github.com/sirupsen/logrus v1.4.2
 ## explicit
 github.com/sirupsen/logrus
-# github.com/skeema/mybase v1.0.12-0.20201218182149-9bf088e98525
+# github.com/skeema/mybase v1.0.13
 ## explicit
 github.com/skeema/mybase
 # github.com/skeema/tengo v0.9.7-0.20201215220818-6707a59a4c0f