misc:test mac and windows on travis too, EPERM fixes

.travis.yml

@@ -1,8 +1,18 @@
+version: ~> 1.0
 language: node_js
 node_js:
   - "8"
   - "10"
   - "12"
+os:
+  - linux
+  - osx
+  - windows
+# using xcode9.2 forces osx 10.12, which is WAAAYYYYYY faster than 10.13
+# in fact, we couldn't get osx 10.13 to ever finish the running the tests
+osx_image: xcode9.2
+git:
+  autocrlf: false
 
 addons:
   apt:
@@ -19,11 +29,6 @@ before_install:
       export LINK="gcc-5";
       export LINKXX="g++-5";
     fi
-  - nvm --version
-  - node --version
-  - npm --version
-  - gcc --version
-  - g++ --version
 
 after_success:
   npm run coverage

README.md

@@ -90,7 +90,7 @@ Both `.provider()` and `.server()` take a single object which allows you to spec
 * `"account_keys_path"`: `String` - Specifies a file to save accounts and private keys to, for testing.
 * `"vmErrorsOnRPCResponse"`: `boolean` - Whether or not to transmit transaction failures as RPC errors. Set to `false` for error reporting behaviour which is compatible with other clients such as geth and Parity. This is `true` by default to replicate the error reporting behavior of previous versions of ganache.
 * `"hdPath"`: The hierarchical deterministic path to use when generating accounts. Default: "m/44'/60'/0'/0/"
-* `"hardfork"`: `String` Allows users to specify which hardfork should be used. Supported hardforks are `byzantium`, `constantinople`, `petersburg` (default), and `istanbul` (beta).
+* `"hardfork"`: `String` Allows users to specify which hardfork should be used. Supported hardforks are `byzantium`, `constantinople`, `petersburg`, and `istanbul` (default).
 * `"allowUnlimitedContractSize"`: `boolean` - Allows unlimited contract sizes while debugging (NOTE: this setting is often used in conjuction with an increased `gasLimit`). By setting this to `true`, the check within the EVM for contract size limit of 24KB (see [EIP-170](https://git.io/vxZkK)) is bypassed. Setting this to `true` **will** cause `ganache-core` to behave differently than production environments. (default: `false`; **ONLY** set to `true` during debugging).
 * `"gasPrice"`: `String::hex` Sets the default gas price for transactions if not otherwise specified. Must be specified as a `hex` encoded string in `wei`. Defaults to `"0x77359400"` (2 `gwei`).
 * `"gasLimit"`: `String::hex | number` Sets the block gas limit. Must be specified as a `hex` string or `number`(integer). Defaults to `"0x6691b7"`.